Table 2.9. Admissions aged 18 and older, by education according to primary substance of abuse: 2011 Percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions.]
Education in years	All admis -sions ged 18+	Primary substance at admission
		Alcohol		Opiates		Cocaine		Mari- juana/ hashish	Metham- phetamine/ amphet- amines	Tran- quil- izers	Seda- tives	Hallu- cino- gens	PCP	Inhal- ants	Other/ none speci- fied
		Alcohol only	With second-ary drug	Heroin	Other opiates	Smoked cocaine	Other route
Total admissions aged 18 and older	1,706,851	392,893	312,742	276,978	184,065	99,117	43,601	229,877	107,585	17,144	3,464	1,477	5,735	822	31,351
Highest school grade completed
0 to 8	6.0	5.6	5.5	8.3	4.4	6.7	6.3	5.0	5.5	6.4	4.6	5.3	6.3	4.1	9.4
9 to 11	23.6	15.7	23.7	23.4	20.2	29.0	26.0	34.8	29.9	19.3	20.1	26.2	41.2	21.5	18.1
12 (or GED)	44.6	43.8	44.5	46.8	45.8	42.4	43.7	43.7	45.3	43.2	40.9	46.5	40.9	41.1	46.8
More than 12	25.8	34.9	26.4	21.5	29.7	21.9	24.0	16.5	19.3	31.1	34.5	22.0	11.6	33.3	25.6
Total	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
No. of admissions	1,676,174	383,721	308,975	273,315	181,187	98,138	42,882	227,428	106,783	16,806	3,410	1,437	5,625	810	25,657
SOURCE: Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 10.15.12.