50428

Table 4.1A Numbers (in Thousands) of Persons Who Initiated Marijuana Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	777	309	468	18.5	14.8	23.5
1966	832	289	543	19.1	13.0	24.9
1967	1,397	530	868	18.8	24.9	37.3
1968	1,980	842	1,139	18.6	38.6	49.2
1969	2,462	1,002	1,461	18.7	46.3	66.1
1970	2,692	1,238	1,454	18.6	57.6	64.3
1971	2,954	1,308	1,646	18.5	59.8	76.3
1972	3,164	1,665	1,500	18.2	77.2	66.1
1973	3,490	1,741	1,749	18.6	80.4	79.3
1974	3,222	1,912	1,311	18.2	90.6	59.5
1975	3,227	1,889	1,339	18.1	91.0	63.2
1976	3,226	1,896	1,331	18.3	94.9	65.1
1977	3,345	1,967	1,378	18.6	100.3	66.4
1978	3,289	1,991	1,298	18.3	104.8	67.1
1979	2,996	1,760	1,236	18.8	95.0	60.6
1980	2,573	1,581	992	18.4	86.0	51.2
1981	2,438	1,440	998	18.3	80.7	56.3
1982	2,323	1,393	930	18.9	77.9	47.1
1983	2,351	1,443	908	18.2	80.6	52.7
1984	2,113	1,324	789	18.1	76.0	44.3
1985	2,165	1,357	808	18.0	77.9	48.0
1986	2,062	1,258	805	17.7	74.2	49.5
1987	1,823	1,113	710	18.0	64.5	44.6
1988	1,702	1,075	627	17.8	64.2	40.1
1989	1,647	971	675	18.1	57.1	40.6
1990	1,482	843	639	18.4	48.1	36.7
1991	1,694	1,031	662	18.0	58.0	39.0
1992	1,920	1,167	753	17.2	64.0	47.2
1993	2,154	1,349	805	17.2	72.9	47.2
1994	2,420	1,568	852	17.0	84.6	52.0
1995	2,635	1,674	961	17.0	88.8	57.8
1996	2,483	1,579	903	17.2	82.9	54.4
1997	2,603	1,716	887	17.1	89.3	54.2
1998	2,498	1,684	814	16.8	85.2	51.3
1999	2,640	1,691	950	17.4	84.8	57.4
2000	2,746	1,834	912	16.9	91.3	56.0
2001	2,793	1,833	960	17.4	90.9	57.1
20022	2,686	1,861	825	17.1	91.1	49.1
20033	2,463	1,655	809	17.0	79.7	46.8
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.2A Numbers (in Thousands) of Persons Who Initiated Cocaine Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	80	*	61	20.7	*	2.2
1966	41	*	36	22.5	*	*
1967	87	*	80	23.6	*	2.9
1968	162	49	113	20.2	2.2	4.2
1969	187	46	141	21.0	1.8	4.5
1970	266	76	189	19.3	3.3	7.1
1971	413	93	320	20.6	3.9	10.5
1972	520	136	384	19.3	5.6	13.4
1973	586	162	424	20.3	6.8	13.6
1974	792	191	601	21.4	7.9	16.8
1975	827	169	658	21.1	7.0	18.9
1976	937	194	743	21.1	8.2	23.2
1977	1,165	247	917	21.5	10.6	24.9
1978	1,255	226	1,029	21.4	9.9	29.9
1979	1,315	240	1,075	20.8	10.8	33.6
1980	1,457	293	1,163	22.0	13.4	31.5
1981	1,546	308	1,238	21.3	14.3	36.6
1982	1,518	271	1,248	22.6	12.9	33.5
1983	1,557	254	1,303	22.2	12.3	37.5
1984	1,419	272	1,147	22.0	13.5	33.2
1985	1,441	281	1,159	22.3	14.2	32.9
1986	1,315	256	1,059	22.8	13.2	30.4
1987	1,162	239	923	22.3	12.4	27.7
1988	1,084	175	909	22.7	9.2	26.9
1989	968	154	814	23.0	8.0	23.6
1990	843	162	682	23.2	8.6	19.0
1991	687	121	566	22.9	6.2	15.8
1992	747	160	587	24.5	8.1	14.3
1993	634	143	491	23.1	7.1	13.4
1994	655	160	494	22.5	7.5	14.1
1995	744	214	530	21.3	10.1	16.7
1996	825	244	581	21.6	11.2	17.9
1997	861	243	618	20.8	10.9	20.7
1998	868	264	605	20.9	11.5	19.5
1999	917	270	648	21.1	11.5	20.2
2000	1,002	289	714	20.8	12.0	23.0
2001	1,140	335	805	20.9	13.7	24.9
20022	1,073	333	740	20.3	13.5	22.8
20033	1,094	384	710	19.8	15.3	23.0
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.3A Numbers (in Thousands) of Persons Who Initiated Crack Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	*	*	*	*	*	*
1966	*	*	*	*	*	*
1967	*	*	*	*	*	*
1968	*	*	*	*	*	*
1969	15	*	*	*	*	*
1970	*	*	*	*	*	*
1971	*	*	*	*	*	*
1972	20	*	*	*	*	*
1973	36	*	*	*	*	*
1974	16	*	*	*	*	*
1975	34	*	26	20.7	*	0.6
1976	26	*	26	*	*	*
1977	54	*	41	19.3	*	1.2
1978	86	*	60	20.7	*	1.4
1979	70	*	62	22.1	*	1.6
1980	115	27	88	22.8	1.2	1.8
1981	125	16	109	22.8	0.7	2.6
1982	157	17	140	25.8	0.8	2.1
1983	200	15	185	24.4	0.7	3.6
1984	278	30	248	24.1	1.5	3.9
1985	350	41	309	24.7	2.0	6.0
1986	284	37	247	25.2	1.9	4.6
1987	302	39	263	23.7	2.0	5.4
1988	390	45	344	25.8	2.3	5.4
1989	388	13	375	25.1	0.7	7.3
1990	384	38	346	26.6	2.0	4.9
1991	370	35	334	26.0	1.7	5.8
1992	373	35	338	27.5	1.8	4.8
1993	369	39	330	28.1	1.9	4.8
1994	349	45	304	27.2	2.1	3.8
1995	393	48	345	27.4	2.2	5.9
1996	382	57	325	26.5	2.5	5.2
1997	357	55	301	26.2	2.5	5.4
1998	360	82	278	23.9	3.5	6.0
1999	399	61	338	27.1	2.5	5.6
2000	407	79	328	27.1	3.2	5.4
2001	365	78	287	25.3	3.1	5.3
20022	340	82	258	23.5	3.3	5.2
20033	303	79	225	23.1	3.1	4.5
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.4A Numbers (in Thousands) of Persons Who Initiated Heroin Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	*	*	*	*	*	*
1966	*	*	*	*	*	*
1967	33	*	17	*	*	0.8
1968	78	51	27	16.8	2.3	1.1
1969	35	*	30	19.3	*	1.1
1970	88	31	57	22.2	1.3	1.5
1971	117	26	90	19.4	1.1	3.2
1972	150	18	132	19.7	0.8	4.6
1973	166	36	129	20.1	1.4	4.0
1974	170	36	134	20.3	1.5	4.1
1975	79	21	58	20.1	0.9	1.7
1976	80	*	68	20.9	*	1.9
1977	98	9	89	22.2	0.4	2.4
1978	81	18	63	20.0	0.8	2.0
1979	70	17	53	20.6	0.8	1.4
1980	67	*	53	20.7	*	1.5
1981	90	13	77	20.6	0.6	2.2
1982	55	*	51	22.7	*	1.3
1983	66	*	60	23.3	*	1.3
1984	89	17	72	23.0	0.8	1.5
1985	37	*	35	24.1	*	0.7
1986	67	*	49	22.8	*	1.0
1987	82	8	73	25.2	0.4	1.6
1988	94	*	83	22.9	*	1.9
1989	82	*	76	24.6	*	1.5
1990	50	*	46	26.4	*	0.6
1991	63	*	61	25.3	*	1.2
1992	109	10	99	26.9	0.5	1.1
1993	59	8	51	25.2	0.4	0.8
1994	79	14	65	25.5	0.7	0.9
1995	111	30	81	23.0	1.4	1.3
1996	140	24	117	23.7	1.1	2.8
1997	114	35	79	22.3	1.5	1.9
1998	140	29	112	22.7	1.2	2.7
1999	121	29	92	22.8	1.2	2.2
2000	114	36	77	20.8	1.4	2.1
2001	154	38	116	22.8	1.6	2.9
20022	147	33	115	22.3	1.2	2.5
20033	96	39	57	20.2	1.5	1.6
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.5A Numbers (in Thousands) of Persons Who Initiated Hallucinogen Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	104	41	63	17.9	2.0	3.2
1966	146	59	87	19.8	2.7	3.5
1967	245	92	153	18.7	4.1	6.0
1968	393	188	204	18.7	8.3	7.3
1969	846	322	524	18.8	14.1	20.5
1970	945	408	537	18.3	18.0	21.6
1971	958	488	470	18.0	21.4	17.8
1972	1,041	521	521	17.7	22.6	19.8
1973	956	466	491	18.1	19.9	18.2
1974	970	481	489	18.7	20.4	16.6
1975	972	462	510	18.2	19.8	19.1
1976	953	441	512	19.1	19.1	17.8
1977	907	398	510	18.8	17.4	18.2
1978	943	452	491	18.2	19.9	17.8
1979	953	467	486	18.4	21.4	15.9
1980	1,015	439	576	19.1	20.6	18.6
1981	982	385	597	19.3	18.6	19.9
1982	985	383	602	20.0	18.5	18.9
1983	743	286	456	19.1	14.0	15.9
1984	705	263	442	19.3	13.0	15.1
1985	744	323	421	18.6	16.0	14.9
1986	837	328	509	19.4	16.9	17.2
1987	751	319	432	19.2	16.6	15.3
1988	757	296	461	19.1	15.8	16.2
1989	742	279	462	19.1	14.8	16.3
1990	654	283	371	19.5	15.1	12.1
1991	751	329	422	18.8	17.4	15.6
1992	726	332	394	18.8	16.9	14.1
1993	807	380	427	19.1	19.1	14.6
1994	943	470	473	18.1	23.3	18.4
1995	962	473	489	18.2	22.7	19.0
1996	1,050	510	540	18.8	23.9	21.1
1997	1,077	501	576	18.8	22.7	22.5
1998	1,104	514	590	18.8	22.5	21.9
1999	1,383	617	766	18.6	26.7	30.3
2000	1,522	664	858	19.1	28.2	32.1
2001	1,511	681	830	19.2	28.5	29.3
20022	1,141	530	610	18.6	21.5	22.0
20033	1,065	526	539	18.9	21.1	18.0
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.6A Numbers (in Thousands) of Persons Who Initiated LSD Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	58	*	32	22.7	*	0.9
1966	110	42	69	20.6	2.0	2.6
1967	142	52	91	19.3	2.2	3.4
1968	366	209	157	18.1	9.6	5.3
1969	674	244	431	18.9	10.6	16.8
1970	764	342	422	18.1	15.0	17.1
1971	769	347	422	18.5	15.0	15.1
1972	897	460	437	17.7	20.0	16.3
1973	816	403	413	18.3	17.0	14.6
1974	785	409	376	18.1	17.4	13.4
1975	664	312	352	18.5	13.3	12.2
1976	643	284	360	18.3	12.2	12.9
1977	683	311	372	18.8	13.4	12.9
1978	634	261	373	18.4	11.5	13.0
1979	787	388	399	18.3	17.5	13.0
1980	772	359	414	19.0	16.7	12.6
1981	773	319	455	19.3	15.3	14.2
1982	681	288	393	19.1	13.8	12.4
1983	565	222	343	19.0	10.8	11.8
1984	549	196	353	19.5	9.7	11.2
1985	570	266	303	19.2	13.1	9.1
1986	596	247	350	19.2	12.6	11.5
1987	567	287	280	18.6	14.9	9.4
1988	597	254	343	18.7	13.5	11.9
1989	604	231	373	19.5	12.3	11.6
1990	537	251	286	18.9	13.4	9.8
1991	597	302	296	18.3	16.0	10.9
1992	620	284	336	18.5	14.7	12.4
1993	579	282	297	18.5	14.3	10.6
1994	714	400	314	17.8	19.7	11.8
1995	780	404	376	17.8	19.4	14.8
1996	805	413	392	18.2	19.3	15.0
1997	777	392	385	18.3	17.7	14.9
1998	716	401	314	17.9	17.6	12.1
1999	762	397	365	17.9	17.1	13.8
2000	788	392	396	18.1	16.6	14.7
2001	614	314	300	18.1	13.0	10.9
20022	303	170	133	17.3	6.8	5.0
20033	320	147	173	18.5	5.7	5.4
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.7A Numbers (in Thousands) of Persons Who Initiated PCP Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	*	*	*	*	*	*
1966	*	*	*	*	*	*
1967	*	*	*	*	*	*
1968	72	68	*	15.3	3.1	*
1969	58	43	*	17.2	1.8	*
1970	171	77	94	18.1	3.4	3.5
1971	264	121	143	19.2	5.2	4.6
1972	343	152	191	18.5	6.5	6.3
1973	352	132	219	19.0	5.6	7.7
1974	447	211	236	18.2	8.7	7.9
1975	409	203	206	18.4	8.5	6.4
1976	489	229	260	19.3	9.7	7.6
1977	433	177	257	19.0	7.6	7.9
1978	407	164	243	20.1	7.2	6.2
1979	350	144	206	18.9	6.5	6.1
1980	278	102	176	20.2	4.6	4.9
1981	247	87	159	19.6	4.1	4.5
1982	234	60	173	21.2	2.8	4.4
1983	157	53	104	19.3	2.6	3.2
1984	121	31	90	19.5	1.5	2.8
1985	116	49	68	18.9	2.4	2.1
1986	124	29	94	20.0	1.4	2.7
1987	101	34	67	20.6	1.7	1.7
1988	94	33	61	21.2	1.7	1.3
1989	117	44	73	20.4	2.3	1.8
1990	71	35	36	21.7	1.8	0.6
1991	81	38	43	20.0	1.9	1.1
1992	85	25	59	19.8	1.3	1.8
1993	89	45	44	19.2	2.2	1.3
1994	94	59	35	17.0	2.9	1.3
1995	145	68	76	18.4	3.2	2.7
1996	131	69	61	17.9	3.1	1.9
1997	124	67	57	17.6	2.8	2.0
1998	105	62	43	17.4	2.6	1.4
1999	149	79	69	17.7	3.3	2.5
2000	166	102	65	17.6	4.1	2.0
2001	177	97	79	17.7	3.9	2.4
20022	141	87	54	17.0	3.4	1.8
20033	136	78	58	17.8	3.0	1.4
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.8A Numbers (in Thousands) of Persons Who Initiated Ecstasy Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	*	*	*	*	*	*
1966	*	*	*	*	*	*
1967	*	*	*	*	*	*
1968	*	*	*	*	*	*
1969	*	*	*	*	*	*
1970	*	*	*	*	*	*
1971	*	*	*	*	*	*
1972	21	*	*	*	*	*
1973	15	*	*	*	*	*
1974	*	*	*	*	*	*
1975	*	*	*	*	*	*
1976	38	*	30	21.9	*	*
1977	*	*	*	*	*	*
1978	16	*	8	*	*	*
1979	38	*	35	23.5	*	0.8
1980	33	*	29	24.1	*	0.6
1981	47	*	47	24.2	*	0.9
1982	29	12	17	19.9	0.6	0.4
1983	82	*	73	26.1	*	1.2
1984	93	*	91	25.1	*	1.6
1985	160	20	140	21.7	1.0	3.4
1986	179	23	155	22.9	1.2	3.8
1987	178	16	162	23.4	0.8	4.3
1988	191	37	154	22.9	1.9	3.9
1989	211	33	178	22.0	1.7	5.0
1990	197	17	180	24.8	0.9	3.5
1991	166	16	149	23.0	0.8	3.7
1992	208	24	184	24.0	1.2	4.0
1993	219	39	179	22.6	1.9	4.9
1994	268	57	211	22.2	2.8	5.8
1995	339	68	271	21.4	3.2	8.2
1996	412	100	313	22.7	4.4	9.0
1997	563	123	440	21.9	5.4	12.6
1998	839	166	674	21.4	7.1	20.3
1999	1,315	310	1,005	21.3	13.1	29.9
2000	1,633	406	1,227	21.3	17.0	36.9
2001	1,661	491	1,170	21.6	20.3	32.6
20022	1,152	342	810	21.5	13.8	21.8
20033	803	268	535	21.0	10.6	14.5
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.9A Numbers (in Thousands) of Persons Who Initiated Inhalant Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	92	91	*	13.9	4.3	*
1966	172	139	33	15.4	5.8	1.4
1967	194	132	61	16.3	5.4	2.3
1968	209	146	63	17.0	6.2	1.7
1969	296	213	83	16.1	9.2	3.3
1970	335	204	131	16.4	7.7	5.2
1971	325	207	117	17.3	8.4	3.2
1972	326	220	106	16.3	8.6	3.6
1973	406	226	180	18.1	9.5	5.4
1974	465	248	217	18.3	9.4	6.0
1975	519	316	203	17.3	12.3	6.7
1976	599	302	298	18.2	12.7	9.1
1977	742	345	396	18.4	14.1	11.5
1978	636	350	286	17.9	14.6	8.6
1979	806	404	401	18.6	17.7	10.9
1980	678	379	299	18.5	17.5	8.3
1981	597	329	268	18.1	15.1	7.2
1982	562	282	280	18.8	12.4	6.9
1983	579	325	254	18.1	14.3	6.6
1984	547	307	240	18.1	14.7	6.9
1985	573	276	297	19.0	13.6	8.6
1986	573	338	235	18.9	16.6	6.0
1987	560	315	244	18.1	15.1	7.7
1988	551	323	228	17.5	15.9	7.4
1989	464	239	225	18.0	11.4	7.8
1990	523	287	236	17.9	14.4	8.3
1991	472	268	204	18.5	13.3	5.6
1992	559	359	200	16.9	17.4	7.2
1993	597	338	259	18.1	16.1	7.8
1994	551	373	178	16.7	16.6	6.3
1995	689	404	285	17.6	17.7	10.3
1996	670	408	262	17.0	16.5	9.3
1997	704	455	248	16.4	17.5	9.7
1998	821	507	314	17.2	18.4	11.1
1999	904	572	332	16.6	20.2	11.5
2000	1,028	708	320	16.4	24.8	10.6
2001	1,085	759	325	16.0	27.9	11.5
20022	1,057	812	245	15.4	29.6	8.4
20033	1,077	829	248	15.4	31.9	8.4
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.10A Numbers (in Thousands) of Persons Who Initiated Nonmedical Use of Pain Relievers in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	95	33	62	24.9	*	*
1966	52	28	24	19.8	1.0	*
1967	128	52	76	19.8	2.3	2.7
1968	224	70	154	19.9	2.9	6.1
1969	296	150	145	19.8	6.4	4.2
1970	367	172	195	19.3	6.6	5.9
1971	404	160	244	19.6	6.7	8.1
1972	358	133	224	19.6	5.4	7.0
1973	431	177	254	19.8	7.3	7.4
1974	456	201	256	19.4	7.7	6.9
1975	495	177	318	20.2	7.1	8.8
1976	443	166	277	20.9	7.0	6.6
1977	491	156	335	20.2	6.5	9.8
1978	457	173	284	19.9	7.2	7.8
1979	526	223	303	20.1	10.0	7.7
1980	509	177	332	21.6	7.8	6.7
1981	488	127	361	21.1	5.8	9.1
1982	460	146	314	21.9	6.5	6.8
1983	594	143	451	22.2	6.6	10.3
1984	506	113	393	24.0	4.9	8.6
1985	540	156	383	21.9	6.9	9.1
1986	562	94	467	24.3	4.5	10.0
1987	625	138	487	24.6	6.2	9.2
1988	538	89	448	24.7	4.3	9.4
1989	612	134	478	24.2	6.6	9.9
1990	557	115	442	23.3	5.5	10.2
1991	604	146	457	23.8	6.9	9.9
1992	777	184	593	24.5	8.3	11.7
1993	694	173	521	23.3	7.6	12.5
1994	932	260	672	24.1	11.2	13.8
1995	917	298	618	23.0	12.5	14.2
1996	1,100	355	744	22.0	14.8	20.4
1997	1,316	430	886	22.1	17.3	24.0
1998	1,548	558	990	22.7	21.9	23.5
1999	1,810	677	1,133	22.4	26.4	27.8
2000	2,268	860	1,408	22.0	34.7	36.3
2001	2,400	1,025	1,375	21.4	41.9	35.0
20022	2,699	1,154	1,545	22.0	47.8	37.5
20033	2,581	1,229	1,352	21.3	51.1	31.6
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.11A Numbers (in Thousands) of Persons Who Initiated Nonmedical Use of OxyContin^® in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2004 NSDUH

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	*	*	*	*	*	*
1966	*	*	*	*	*	*
1967	*	*	*	*	*	*
1968	*	*	*	*	*	*
1969	*	*	*	*	*	*
1970	*	*	*	*	*	*
1971	*	*	*	*	*	*
1972	*	*	*	*	*	*
1973	*	*	*	*	*	*
1974	*	*	*	*	*	*
1975	*	*	*	*	*	*
1976	*	*	*	*	*	*
1977	*	*	*	*	*	*
1978	*	*	*	*	*	*
1979	*	*	*	*	*	*
1980	*	*	*	*	*	*
1981	*	*	*	*	*	*
1982	*	*	*	*	*	*
1983	*	*	*	*	*	*
1984	*	*	*	*	*	*
1985	*	*	*	*	*	*
1986	*	*	*	*	*	*
1987	*	*	*	*	*	*
1988	*	*	*	*	*	*
1989	*	*	*	*	*	*
1990	*	*	*	*	*	*
1991	*	*	*	*	*	*
1992	18	*	*	*	*	*
1993	42	*	*	*	*	*
1994	*	*	*	*	*	*
1995	21	9	*	28.3	0.4	*
1996	46	17	*	18.7	0.8	*
1997	92	25	68	20.5	1.1	2.1
1998	124	39	85	21.9	1.7	2.1
1999	186	48	138	23.8	1.9	2.9
2000	304	55	248	25.9	2.3	4.9
2001	502	104	398	24.7	4.3	8.4
2002	595	146	450	24.0	5.8	9.1
2003	721	198	522	26.1	7.7	9.1
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. NOTE: OxyContin® was not approved for use by the U.S. Food and Drug Administration until December 12, 1995. Inferences made from data of respondents indicating use in or before 1995 should be made with caution. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2004.

50428

Table 4.12A Numbers (in Thousands) of Persons Who Initiated Nonmedical Use of Tranquilizers in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	59	28	31	17.7	1.3	*
1966	62	*	*	18.5	*	*
1967	110	*	87	21.2	*	2.8
1968	155	26	129	21.1	1.2	4.4
1969	235	115	120	19.1	5.0	3.6
1970	218	116	102	18.3	4.9	3.4
1971	255	120	135	20.6	5.2	4.1
1972	374	150	224	19.2	6.1	6.9
1973	460	157	302	20.3	6.5	8.4
1974	462	225	237	18.6	9.1	7.4
1975	471	139	332	20.5	5.8	8.8
1976	492	201	291	20.0	8.3	7.9
1977	423	159	264	20.6	6.7	7.0
1978	394	118	276	21.0	5.1	7.6
1979	481	182	299	20.7	8.0	7.5
1980	385	137	248	20.1	6.3	6.9
1981	447	124	323	21.2	5.8	8.5
1982	416	96	320	21.9	4.6	7.8
1983	403	64	339	22.9	2.6	7.8
1984	468	91	377	23.8	4.3	7.5
1985	424	104	320	24.2	5.0	6.6
1986	391	97	294	24.6	4.8	5.8
1987	354	47	307	24.7	2.1	6.1
1988	415	59	356	25.5	2.9	7.7
1989	412	52	360	25.6	2.6	7.5
1990	377	78	299	24.9	4.1	6.0
1991	380	54	326	26.2	2.6	5.7
1992	441	73	368	28.0	3.3	5.9
1993	519	114	405	26.2	5.5	7.0
1994	467	107	360	24.3	5.1	7.4
1995	580	145	435	25.9	6.7	7.4
1996	659	174	485	23.1	7.7	11.4
1997	668	195	473	23.6	8.4	10.6
1998	860	246	614	24.1	10.4	12.6
1999	916	257	659	23.3	10.7	14.6
2000	1,298	355	943	25.0	14.6	19.4
2001	1,212	391	820	22.9	16.0	18.6
20022	1,253	410	843	23.0	16.6	18.0
20033	1,322	386	936	24.3	15.2	16.5
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.13A Numbers (in Thousands) of Persons Who Initiated Nonmedical Use of Stimulants in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	149	*	105	19.9	*	3.7
1966	218	47	171	20.1	2.2	7.5
1967	266	135	130	18.2	6.2	5.2
1968	348	156	192	18.1	7.1	8.1
1969	443	200	242	18.4	8.9	9.6
1970	577	228	349	18.9	10.0	13.2
1971	624	227	397	18.7	9.7	14.4
1972	626	270	356	18.6	11.4	12.7
1973	535	244	291	18.5	10.4	9.6
1974	603	247	356	18.5	10.4	12.8
1975	573	237	337	18.8	9.7	11.3
1976	600	237	363	19.5	10.1	11.7
1977	656	276	380	18.8	11.8	11.9
1978	593	227	366	19.4	9.9	11.0
1979	643	295	348	18.6	13.4	10.7
1980	672	291	381	18.9	13.5	11.9
1981	595	229	367	20.0	10.9	9.2
1982	597	236	361	19.6	11.0	10.0
1983	488	148	340	21.1	7.2	8.2
1984	424	169	255	19.2	8.2	7.4
1985	409	142	266	21.3	7.1	6.5
1986	397	142	255	20.1	7.2	7.3
1987	377	114	263	21.2	5.7	6.9
1988	344	135	209	20.2	7.1	5.7
1989	328	81	246	21.8	4.0	6.7
1990	317	99	218	21.3	5.0	6.0
1991	278	83	196	21.9	4.0	4.7
1992	303	127	176	20.8	6.2	4.3
1993	399	134	265	20.8	6.6	7.1
1994	432	174	258	20.3	8.1	6.8
1995	533	215	318	20.6	9.8	9.0
1996	577	228	349	20.3	10.2	10.2
1997	553	245	308	20.0	10.6	8.9
1998	648	280	369	20.2	11.7	10.1
1999	706	293	412	20.5	11.9	10.6
2000	808	362	446	19.9	14.6	12.0
2001	853	396	457	19.7	16.1	12.5
20022	775	381	393	19.1	15.0	11.0
20033	764	308	457	20.9	11.9	10.8
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.14A Numbers (in Thousands) of Persons Who Initiated Nonmedical Use of Methamphetamine in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	28	*	*	*	*	*
1966	97	35	62	19.4	1.6	2.8
1967	112	62	50	17.3	2.9	2.2
1968	138	65	73	17.6	2.9	3.2
1969	241	120	121	18.8	5.3	4.1
1970	279	96	184	18.8	4.2	7.1
1971	442	153	289	19.0	6.5	10.1
1972	349	137	212	18.1	5.7	7.9
1973	371	145	226	18.9	6.1	7.1
1974	364	148	216	18.3	6.2	7.6
1975	382	151	231	18.9	6.3	7.7
1976	403	180	223	18.8	7.6	6.9
1977	417	179	238	18.7	7.7	7.1
1978	322	127	195	19.0	5.4	6.3
1979	465	237	228	18.0	10.7	7.1
1980	398	174	224	18.7	8.0	6.6
1981	379	150	229	19.5	7.1	6.0
1982	375	139	236	19.3	6.5	7.0
1983	369	102	267	20.5	4.9	7.2
1984	324	116	208	19.4	5.7	5.9
1985	320	107	214	20.8	5.3	5.3
1986	330	124	206	19.7	6.3	6.0
1987	321	96	225	21.4	4.9	5.3
1988	257	83	174	20.6	4.3	4.8
1989	253	57	196	22.3	2.9	5.2
1990	211	52	159	21.8	2.6	4.1
1991	231	51	180	22.4	2.6	4.4
1992	215	88	127	20.4	4.4	3.2
1993	286	98	188	21.0	4.9	5.0
1994	296	103	193	20.8	5.0	5.2
1995	345	126	219	20.9	5.8	6.2
1996	327	122	205	20.9	5.5	5.7
1997	336	130	206	20.1	5.7	5.8
1998	352	140	212	20.8	6.0	5.2
1999	308	112	196	20.9	4.6	5.2
2000	337	139	198	19.8	5.7	5.5
2001	362	157	205	19.3	6.3	5.7
20022	343	140	203	19.9	5.5	5.1
20033	363	132	231	22.0	5.2	4.5
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.15A Numbers (in Thousands) of Persons Who Initiated Nonmedical Use of Sedatives in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	54	48	*	14.8	1.9	*
1966	49	*	40	21.8	*	1.1
1967	164	76	88	17.4	3.3	3.7
1968	182	89	93	18.3	4.1	3.6
1969	292	174	119	18.7	7.7	3.6
1970	387	228	159	17.4	9.9	5.8
1971	425	182	243	18.7	7.8	8.3
1972	450	154	296	18.9	6.6	10.5
1973	526	253	273	18.1	10.4	9.4
1974	551	242	309	18.7	10.1	9.8
1975	470	191	280	19.7	8.0	9.0
1976	478	231	247	19.0	9.8	7.5
1977	495	168	328	19.3	7.2	9.9
1978	460	210	250	19.5	9.2	6.6
1979	498	221	277	18.8	10.0	8.6
1980	398	154	243	19.7	7.1	6.7
1981	395	121	273	21.3	5.7	7.3
1982	367	111	256	21.6	5.2	6.2
1983	233	47	187	21.1	2.2	4.6
1984	194	50	144	21.0	2.4	4.0
1985	132	43	89	22.6	2.1	1.9
1986	94	28	67	22.2	1.3	1.8
1987	109	13	96	26.8	0.6	1.6
1988	80	10	70	24.8	0.5	1.2
1989	90	19	72	22.8	0.9	1.6
1990	101	21	80	23.5	1.0	1.6
1991	76	14	61	27.1	0.7	0.9
1992	96	34	62	23.5	1.6	1.1
1993	105	33	72	23.2	1.6	1.7
1994	91	23	68	23.3	1.0	1.3
1995	117	31	85	25.5	1.4	1.5
1996	115	42	73	22.3	1.7	1.8
1997	120	41	79	21.9	1.7	1.9
1998	147	49	98	25.7	2.0	1.9
1999	164	52	111	25.4	2.0	2.1
2000	191	66	125	22.8	2.6	2.2
2001	225	91	134	23.2	3.3	2.2
20022	267	87	179	28.0	3.1	2.2
20033	245	90	154	26.1	3.4	2.3
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.16A Numbers (in Thousands) of Persons Who Initiated Alcohol Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	3,261	1,817	1,444	17.4	96.1	223.0
1966	2,968	1,638	1,330	17.1	86.6	213.3
1967	3,604	1,959	1,645	17.2	104.4	246.2
1968	3,552	2,059	1,493	17.2	108.2	216.3
1969	3,893	2,213	1,679	17.1	115.3	259.3
1970	4,003	2,390	1,613	16.9	122.2	261.0
1971	3,922	2,441	1,481	16.8	125.4	239.0
1972	4,272	2,703	1,569	16.9	141.9	260.1
1973	4,072	2,685	1,387	16.5	142.7	234.9
1974	4,211	2,845	1,366	16.7	153.4	233.1
1975	3,919	2,597	1,322	16.6	140.9	226.0
1976	3,930	2,600	1,330	16.6	142.6	229.0
1977	4,130	2,811	1,319	16.4	158.8	242.3
1978	3,852	2,702	1,150	16.3	159.2	209.8
1979	3,993	2,721	1,273	16.5	167.1	235.4
1980	3,626	2,453	1,173	16.6	155.1	220.8
1981	3,606	2,461	1,145	16.7	158.9	214.7
1982	3,466	2,403	1,063	16.6	152.9	202.9
1983	3,289	2,199	1,090	16.5	141.4	217.7
1984	3,365	2,367	998	16.5	156.6	198.4
1985	3,263	2,237	1,026	16.7	149.6	212.7
1986	3,316	2,404	912	16.1	165.0	192.6
1987	3,119	2,063	1,057	16.7	144.7	218.4
1988	2,909	1,971	938	16.4	138.9	194.7
1989	3,195	2,140	1,055	16.7	152.3	210.2
1990	2,933	1,941	993	16.8	135.3	198.0
1991	2,890	1,875	1,015	16.6	125.7	211.1
1992	3,059	2,009	1,050	16.8	128.9	207.5
1993	3,190	2,192	998	16.4	138.4	198.0
1994	3,311	2,260	1,051	16.2	137.5	206.5
1995	3,299	2,218	1,081	16.5	132.4	209.1
1996	3,473	2,338	1,136	16.6	134.5	221.3
1997	3,668	2,538	1,130	16.3	141.8	220.4
1998	3,882	2,633	1,248	16.4	145.8	238.8
1999	4,072	2,832	1,240	16.5	155.6	233.2
2000	4,764	3,358	1,407	16.3	191.6	273.3
20012	4,906	3,500	1,406	16.3	200.7	277.4
20023	5,240	3,748	1,492	16.2	216.6	290.0
20033	--	--	1,442	--	228.2	284.1
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.17A Numbers (in Thousands) of Persons Who Initiated Alcohol Use in the United States by Underage and Legal Drinking Age Groups, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 21	21 or Older		12-20	21-25
1965	3,261	2,677	584	17.4	123.1	172.8
1966	2,968	2,524	444	17.1	114.7	156.4
1967	3,604	3,099	505	17.2	139.9	162.5
1968	3,552	3,011	542	17.2	134.9	153.1
1969	3,893	3,276	616	17.1	146.7	201.3
1970	4,003	3,361	642	16.9	149.7	211.4
1971	3,922	3,314	609	16.8	149.1	182.8
1972	4,272	3,610	662	16.9	165.0	212.9
1973	4,072	3,648	424	16.5	169.3	127.5
1974	4,211	3,694	517	16.7	173.7	159.6
1975	3,919	3,449	470	16.6	163.8	142.1
1976	3,930	3,435	494	16.6	165.1	150.4
1977	4,130	3,678	452	16.4	182.1	149.7
1978	3,852	3,405	447	16.3	174.7	147.7
1979	3,993	3,518	476	16.5	187.0	164.7
1980	3,626	3,219	407	16.6	176.4	133.8
1981	3,606	3,210	396	16.7	179.6	123.2
1982	3,466	3,052	414	16.6	169.6	132.2
1983	3,289	2,865	424	16.5	160.6	156.5
1984	3,365	2,987	378	16.5	172.2	126.4
1985	3,263	2,846	417	16.7	167.1	149.4
1986	3,316	2,950	366	16.1	175.8	143.7
1987	3,119	2,698	422	16.7	164.0	157.8
1988	2,909	2,524	385	16.4	152.1	163.3
1989	3,195	2,734	461	16.7	165.4	182.8
1990	2,933	2,465	468	16.8	147.0	187.1
1991	2,890	2,446	444	16.6	142.7	180.9
1992	3,059	2,566	493	16.8	143.7	182.9
1993	3,190	2,767	423	16.4	151.8	162.6
1994	3,311	2,869	442	16.2	152.3	170.0
1995	3,299	2,847	451	16.5	148.4	169.3
1996	3,473	2,983	490	16.6	151.5	180.5
1997	3,668	3,220	448	16.3	158.9	167.5
1998	3,882	3,413	468	16.4	166.2	173.6
1999	4,072	3,561	511	16.5	171.4	191.0
2000	4,764	4,189	575	16.3	207.9	231.9
20012	4,906	4,347	559	16.3	216.8	229.1
20023	5,240	4,634	606	16.2	233.1	235.4
20033	--	--	602	--	244.2	214.3
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.18A Numbers (in Thousands) of Persons Who Initiated Cigarette Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	2,714	2,158	556	14.9	125.5	89.4
1966	2,600	1,921	680	15.3	110.3	96.7
1967	3,131	2,397	734	15.3	142.2	99.5
1968	3,046	2,186	860	15.6	123.2	112.3
1969	2,905	2,300	605	15.2	130.7	75.7
1970	3,133	2,418	716	15.2	132.8	89.4
1971	3,214	2,533	681	15.1	140.8	82.8
1972	3,487	2,644	842	15.3	149.5	99.6
1973	3,542	2,834	707	14.8	159.3	81.6
1974	3,418	2,754	665	14.8	156.7	78.1
1975	3,324	2,588	737	15.3	151.4	79.4
1976	3,309	2,581	728	15.2	157.7	78.3
1977	2,921	2,326	595	15.0	138.7	64.5
1978	3,056	2,461	595	15.3	154.1	58.9
1979	2,853	2,188	664	15.4	137.6	69.5
1980	2,650	1,953	697	15.8	127.3	71.2
1981	2,653	1,982	671	15.4	126.2	70.7
1982	2,531	1,978	553	15.6	127.4	54.2
1983	2,640	2,061	579	15.7	135.2	55.4
1984	2,435	1,875	560	15.5	122.4	57.4
1985	2,576	1,949	626	15.6	129.7	64.7
1986	2,362	1,815	547	15.5	120.0	57.1
1987	2,416	1,771	645	15.6	117.3	68.0
1988	2,503	1,820	683	15.5	120.0	70.8
1989	2,404	1,757	647	15.8	118.1	65.8
1990	2,402	1,742	659	15.7	114.4	65.7
1991	2,497	1,842	655	15.6	117.4	65.2
1992	2,596	1,857	739	15.9	115.6	70.7
1993	2,716	2,070	647	15.3	127.5	63.9
1994	2,863	2,175	688	15.3	129.1	66.6
1995	3,039	2,353	686	15.2	137.3	68.3
1996	3,237	2,444	794	15.5	142.1	78.8
1997	3,239	2,388	851	15.6	134.4	85.6
1998	3,119	2,414	705	15.4	135.6	72.9
1999	3,116	2,323	793	15.8	131.8	81.5
2000	3,019	2,261	757	15.9	127.7	74.1
20012	2,791	2,104	687	15.9	115.3	66.7
20023	2,644	1,874	770	16.4	101.4	70.5
20033	--	--	711	--	102.1	67.5
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.19A Numbers (in Thousands) of Persons Who Initiated Daily Cigarette Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	1,545	777	768	17.7	38.3	59.4
1966	1,589	822	768	17.6	39.9	57.2
1967	1,782	908	874	17.4	44.1	63.5
1968	1,727	684	1,044	18.2	31.3	70.2
1969	1,906	880	1,026	18.1	40.7	66.5
1970	1,820	935	885	18.0	43.3	52.7
1971	1,830	934	896	17.8	42.9	50.8
1972	1,972	1,047	925	17.5	47.5	52.2
1973	2,134	1,123	1,011	17.7	49.7	53.0
1974	2,139	1,226	913	17.4	55.0	48.7
1975	2,156	1,249	907	17.3	56.4	47.6
1976	1,974	1,120	854	17.7	52.1	40.7
1977	1,884	1,067	817	17.6	49.2	38.8
1978	1,864	1,019	845	18.1	47.8	38.2
1979	1,732	936	797	17.8	45.4	37.2
1980	1,710	876	834	18.3	42.3	35.3
1981	1,603	846	757	18.1	42.3	33.3
1982	1,592	787	805	18.4	38.9	34.9
1983	1,516	766	750	18.4	38.7	31.4
1984	1,403	701	702	18.1	36.5	31.0
1985	1,389	733	657	17.9	38.5	30.0
1986	1,360	746	614	18.3	39.6	26.1
1987	1,469	702	767	18.5	37.2	32.5
1988	1,326	627	699	18.9	34.4	28.2
1989	1,343	631	712	18.3	34.4	32.3
1990	1,408	655	753	18.9	36.3	32.3
1991	1,463	667	796	18.9	36.1	33.4
1992	1,466	737	729	18.6	39.2	30.4
1993	1,434	783	651	17.9	40.9	29.5
1994	1,595	841	754	18.4	42.6	32.4
1995	1,608	883	725	18.0	43.5	33.4
1996	1,950	1,010	940	18.8	48.4	40.9
1997	1,960	1,048	911	18.4	49.4	41.9
1998	1,811	996	815	17.9	45.6	39.3
1999	1,827	986	841	18.2	44.6	38.9
2000	1,855	971	883	18.5	43.0	39.3
2001	1,639	883	756	18.8	39.1	32.2
20022	1,519	818	701	18.9	35.3	28.7
20033	1,356	702	654	18.9	29.5	26.3
*Low precision; no estimate reported. -- Not available. NOTE: Daily Cigarette Use is defined as ever smoking every day for at least 30 days. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.20A Numbers (in Thousands) of Persons Who Initiated Smokeless Tobacco Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	506	316	191	17.3	13.2	8.0
1966	392	186	207	18.6	6.5	8.2
1967	544	306	239	17.3	11.3	9.5
1968	558	322	236	18.0	12.1	8.0
1969	571	364	206	16.6	13.0	7.6
1970	723	400	323	17.5	14.4	11.9
1971	648	374	274	17.5	12.2	8.3
1972	758	479	279	17.2	16.9	8.5
1973	923	531	392	17.7	18.3	12.6
1974	831	514	317	16.7	18.1	11.1
1975	941	616	325	16.7	20.5	10.2
1976	940	601	338	17.0	22.1	9.8
1977	1,214	746	468	17.4	27.9	12.9
1978	1,234	793	441	16.7	30.7	12.6
1979	1,355	905	450	16.9	36.9	12.1
1980	1,249	820	429	17.1	34.8	12.6
1981	1,368	821	547	17.5	35.7	15.5
1982	1,363	873	490	17.1	37.1	13.7
1983	1,272	869	403	16.7	40.5	12.5
1984	1,461	968	493	17.2	46.2	14.4
1985	1,143	791	352	16.7	39.5	10.9
1986	1,136	790	347	17.0	40.7	10.9
1987	991	611	379	17.9	31.2	11.2
1988	987	644	343	17.6	32.9	10.7
1989	972	592	380	17.5	31.1	13.7
1990	904	599	304	17.3	31.2	10.3
1991	939	572	367	18.4	29.7	12.1
1992	1,034	679	355	17.8	34.0	12.7
1993	974	663	311	17.1	32.3	11.8
1994	1,006	644	362	18.3	30.8	11.8
1995	974	657	317	17.7	30.4	11.3
1996	991	647	345	17.5	28.7	13.8
1997	1,015	640	375	18.5	27.8	13.6
1998	992	613	379	17.8	26.0	13.7
1999	979	633	346	17.3	26.0	13.4
2000	1,036	617	419	18.7	25.9	13.5
2001	1,018	581	438	18.5	24.3	15.0
20022	944	592	353	17.8	24.4	12.0
20033	1,032	575	457	18.6	23.0	15.5
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.21A Numbers (in Thousands) of Persons Who Initiated Cigar Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	1,052	334	717	20.2	14.6	38.2
1966	1,170	518	652	18.4	23.2	37.2
1967	1,162	454	708	19.0	20.8	35.9
1968	1,259	474	784	19.1	20.9	38.7
1969	1,453	553	900	19.9	22.9	38.6
1970	1,279	455	824	19.7	18.8	35.7
1971	1,353	506	846	19.5	20.9	37.3
1972	1,536	619	918	19.0	25.7	37.9
1973	1,513	587	926	18.8	24.1	40.9
1974	1,364	502	861	19.7	19.9	32.9
1975	1,463	534	928	19.4	21.3	36.2
1976	1,446	504	942	20.4	21.0	32.5
1977	1,291	469	821	20.1	19.5	28.7
1978	1,307	413	894	20.4	17.9	31.4
1979	1,316	425	891	20.5	18.2	29.5
1980	1,330	382	948	20.8	16.5	31.0
1981	1,292	377	915	20.6	17.1	29.1
1982	1,441	404	1,037	21.8	18.4	31.4
1983	1,352	403	949	20.8	19.1	29.1
1984	1,272	314	958	21.2	14.8	30.5
1985	1,252	394	859	20.5	19.2	29.1
1986	1,170	355	815	21.3	17.8	24.8
1987	1,379	297	1,082	23.1	14.6	32.4
1988	1,462	351	1,112	22.1	17.9	32.8
1989	1,546	335	1,211	23.3	16.6	33.9
1990	1,441	332	1,108	22.1	17.0	35.1
1991	1,624	436	1,188	22.2	21.3	35.7
1992	1,821	459	1,362	22.7	22.4	40.9
1993	2,006	546	1,459	23.4	26.6	40.5
1994	2,424	742	1,682	22.3	35.5	50.6
1995	2,550	857	1,693	21.6	40.0	55.3
1996	3,133	984	2,149	21.9	44.9	73.6
1997	3,430	1,127	2,303	22.3	51.3	75.9
1998	3,578	1,290	2,288	22.2	57.9	74.6
1999	3,399	1,281	2,118	21.8	57.4	75.0
2000	3,473	1,395	2,078	22.1	62.5	69.7
2001	3,266	1,444	1,821	21.9	65.8	63.4
20022	3,065	1,401	1,664	20.9	62.6	59.3
20033	2,904	1,414	1,490	21.6	63.7	49.6
*Low precision; no estimate reported. -- Not available. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.22A Numbers (in Thousands) of Persons Who Initiated Illicit Drug Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs

YEAR	NUMBER OF INITIATES (1,000s)			MEAN AGE	AGE-SPECIFIC RATES1
	All Ages	Under 18	18 or Older		12-17	18-25
1965	898	384	514	18.4	17.9	25.2
1966	1,047	393	654	19.1	17.1	29.4
1967	1,635	671	964	18.6	30.9	40.9
1968	2,281	939	1,342	18.6	43.0	60.5
1969	2,623	1,149	1,474	18.5	53.5	69.0
1970	2,920	1,382	1,538	18.5	63.6	69.7
1971	3,031	1,444	1,587	18.6	67.3	75.0
1972	3,346	1,736	1,610	18.4	81.5	71.8
1973	3,397	1,741	1,656	18.5	81.3	79.6
1974	3,344	1,970	1,374	18.1	93.6	65.5
1975	3,312	1,977	1,335	18.0	95.9	65.5
1976	3,394	1,977	1,417	18.5	101.1	70.4
1977	3,423	2,054	1,369	18.3	106.3	70.7
1978	3,374	2,049	1,325	18.3	109.0	70.8
1979	3,143	1,887	1,256	18.5	103.9	67.0
1980	2,725	1,681	1,043	18.4	93.8	54.6
1981	2,565	1,548	1,017	18.1	88.5	60.7
1982	2,481	1,491	989	19.0	83.9	51.8
1983	2,481	1,538	943	18.1	86.5	57.5
1984	2,327	1,474	852	18.1	85.2	50.3
1985	2,347	1,444	903	18.3	83.7	54.8
1986	2,261	1,384	877	17.8	83.0	56.1
1987	2,024	1,276	748	18.0	73.7	47.4
1988	1,983	1,219	764	18.0	73.2	50.0
1989	1,897	1,095	802	18.5	64.5	47.9
1990	1,793	1,040	753	18.6	59.8	44.1
1991	1,953	1,164	789	18.4	65.7	45.6
1992	2,249	1,360	889	18.0	74.2	52.5
1993	2,371	1,515	856	17.4	82.4	52.0
1994	2,711	1,754	957	17.4	94.0	57.1
1995	2,893	1,835	1,058	17.2	96.5	64.8
1996	2,840	1,800	1,041	17.7	93.4	61.4
1997	2,959	1,987	973	17.2	101.5	61.0
1998	3,118	2,036	1,081	17.6	100.0	65.1
1999	3,258	2,136	1,122	17.8	104.2	67.0
2000	3,649	2,417	1,231	17.8	119.8	71.6
2001	3,597	2,380	1,217	18.0	121.1	69.8
20022	3,513	2,441	1,072	17.8	125.2	60.6
20033	3,462	2,254	1,208	18.1	117.6	61.9
*Low precision; no estimate reported. -- Not available. NOTE: Illicit Drugs include marijuana/hashish, cocaine (including crack), heroin, hallucinogens, inhalants, or prescription-type psychotherapeutics used nonmedically. NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources. 1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years. 2 Estimated using 2003 and 2004 data only. 3 Estimated using 2004 data only. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

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Table 4.23B Past Year Initiation of Illicit Drug Use among Persons Aged 12 or Older, Persons Aged 12 or Older At Risk for Initiation of Illicit Drug Use, and Past Year Illicit Drug Users Aged 12 or Older, by Demographic Characteristics: Numbers in Thousands and Percentages, 2003 and 2004

Demographic Characteristic	NUMBER OF PAST YEAR INITIATES (1,000s)1		PERCENTAGE OF PAST YEAR INITIATES AMONG TOTAL POPULATION1		PERCENTAGE OF PAST YEAR INITIATES AMONG PERSONS AT RISK FOR INITIATION1,2		PERCENTAGE OF PAST YEAR INITIATES AMONG PAST YEAR USERS1
	2003	2004	2003	2004	2003	2004	2003	2004
TOTAL	2,627	2,784	1.1	1.2	2.0	2.1	7.5	8.0
AGE
12-17	1,562	1,487	6.2	5.9	8.3	7.8	28.6	28.1
12-13	309	278	3.7	3.3	4.1	3.8	40.1	36.0
14-15	587	599	7.1	6.9	9.3	9.0	32.3	32.7
16-17	665	610	8.0	7.5	13.0	12.0	23.1	22.6
18-25	742	818	2.3	2.5	5.6	5.9	6.8	7.5
18-20	529	604	4.2	4.8	9.1	9.9	10.7	12.5
21-25	213	214	1.1	1.1	2.9	2.7	3.5	3.5
26 or Older	324	479	0.2	0.3	0.3	0.5	1.7	2.6
GENDER
Male	1,137	1,173	1.0	1.0	2.0	2.0	5.7	6.0
Female	1,490	1,611	1.2	1.3	2.0	2.2	9.8	10.6
GENDER/AGE
Male 12-17	726	691	5.7	5.4	7.6	7.2	26.1	26.0
Female 12-17	836	796	6.8	6.5	8.9	8.4	31.2	30.1
*Low precision, no estimate reported. NOTE: Illicit Drugs include marijuana/hashish, cocaine (including crack), heroin, hallucinogens, inhalants, or prescription-type psychotherapeutics used nonmedically. a Difference between estimate and 2004 estimate is statistically significant at the 0.05 level. b Difference between estimate and 2004 estimate is statistically significant at the 0.01 level. 1 Past Year Initiates are defined as persons who used the substance(s) for the first time in the 12 months prior to date of interview. 2 At Risk for Initiation is defined as persons who did not use the substance(s) in their lifetime or used the substance(s) for the first time in the past year. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2003 and 2004.

50616

Table 4.24B Past Year Initiation of Marijuana Use among Persons Aged 12 or Older, Persons Aged 12 or Older At Risk for Initiation of Marijuana Use, and Past Year Marijuana Users Aged 12 or Older, by Demographic Characteristics: Numbers in Thousands and Percentages, 2003 and 2004

Demographic Characteristic	NUMBER OF PAST YEAR INITIATES (1,000s)1		PERCENTAGE OF PAST YEAR INITIATES AMONG TOTAL POPULATION1		PERCENTAGE OF PAST YEAR INITIATES AMONG PERSONS AT RISK FOR INITIATION1,2		PERCENTAGE OF PAST YEAR INITIATES AMONG PAST YEAR USERS1
	2003	2004	2003	2004	2003	2004	2003	2004
TOTAL	1,973	2,142	0.8	0.9	1.4	1.5	7.8	8.4
AGE
12-17	1,219	1,252	4.9	5.0	5.7	5.8	32.5	34.2
12-13	113	138	1.3	1.6	1.4	1.7	57.4	59.8
14-15	480	511	5.8	5.9	6.6	6.7	39.4	42.8
16-17	626	603	7.6	7.4	10.7	10.3	26.8	27.0
18-25	666	714	2.1	2.2	4.4	4.5	7.4	8.0
18-20	495	575	3.9	4.6	7.4	8.3	12.0a	14.2
21-25	172	138	0.9	0.7	2.0	1.5	3.5	2.8
26 or Older	88	176	0.0	0.1	0.1	0.2	0.6	1.4
GENDER
Male	929	918	0.8	0.8	1.5	1.4	6.1	6.0
Female	1,044a	1,224	0.9a	1.0	1.3	1.5	10.3a	12.0
GENDER/AGE
Male 12-17	562	577	4.4	4.5	5.2	5.3	28.7	30.1
Female 12-17	657	675	5.4	5.5	6.2	6.3	36.6	38.8
*Low precision, no estimate reported. a Difference between estimate and 2004 estimate is statistically significant at the 0.05 level. b Difference between estimate and 2004 estimate is statistically significant at the 0.01 level. 1 Past Year Initiates are defined as persons who used the substance(s) for the first time in the 12 months prior to date of interview. 2 At Risk for Initiation is defined as persons who did not use the substance(s) in their lifetime or used the substance(s) for the first time in the past year. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2003 and 2004.