Table 3
Use of Alcohol, Cigarette and Illicit Drugs in the Previous 30 Days: Twelfth Graders
	1976	1981	1986	1991	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
Used no substances in past 30 days	25.5	24.6	30.0	40.4	40.4	40.9	38.6	39.8	40.4	42.1	42.5	44.5	46.1	45.6	46.5	48.1
Gender
Male	20.9	21.0	27.4	36.5	37.1	37.3	35.8	35.7	37.6	38.6	38.0	41.3	42.6	43.1	43.1	46.3
Female	30.2	28.1	32.5	44.5	43.7	44.5	41.5	43.9	43.2	45.5	46.9	47.4	49.2	48.1	49.9	50.1
Race
White	23.8	21.3	25.6	36.2	36.9	36.8	33.3	34.0	36.6	36.9	37.1	40.2	41.4	41.2	41.3	43.9
Black	36.9	44.2	53.6	62.9	56.3	57.8	59.7	59.6	60.3	62.2	62.8	63.7	65.1	64.8	64.0	63.9
Parental Education1
Less than high school	26.6	29.4	37.5	42.5	41.9	46.4	43.8	45.9	42.2	44.6	46.8	50.6	50.0	50.7	53.1	47.3
Completed high school	22.8	24.3	29.2	40.4	38.2	41.0	38.3	40.4	39.7	41.3	41.4	44.0	44.2	44.3	44.1	45.2
Some college	27.8	24.2	28.2	40.1	41.1	39.7	39.5	36.7	39.9	40.3	40.9	41.7	45.7	41.3	44.7	46.7
Completed college	24.9	23.8	29.2	39.8	41.3	40.4	37.6	39.9	42.5	44.7	42.5	45.0	47.0	47.6	44.9	51.6
Graduate school	22.6	20.1	28.0	38.3	39.2	41.1	35.2	39.5	37.7	41.6	44.2	43.7	46.1	47.7	49.4	47.7
College Plans
None or under 4 years	22.3	21.8	26.8	34.4	32.2	32.8	30.3	31.9	33.2	34.2	34.0	37.3	35.8	37.4	37.1	36.9
Complete four years	29.1	26.5	31.6	42.7	43.3	43.4	41.2	42.2	42.5	44.8	45.1	46.3	49.2	47.7	48.7	50.9
	1976	1981	1986	1991	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
Used only one substance in past 30 days2	28.8	32.6	33.2	30.8	25.3	24.0	24.1	23.7	23.5	24.3	24.5	24.5	24.8	25.6	25.9	25.9
Gender
Male	29.1	35.2	33.8	32.4	24.8	24.7	24.1	24.1	23.1	24.2	26.2	24.8	24.6	25.9	25.4	26.1
Female	28.5	30.5	32.8	29.4	25.8	23.6	24.2	23.5	24.2	24.4	22.9	24.5	25.2	25.1	26.4	26.0
Race
White	29.6	33.7	34.7	31.8	25.8	24.4	24.6	24.6	23.8	25.4	25.3	24.8	25.4	26.4	27.0	27.2
Black	26.1	28.1	27.0	26.4	23.6	21.8	21.2	19.9	20.5	21.3	20.0	20.6	20.0	20.7	22.0	20.2
Parental Education1
Less than high school	27.9	29.7	29.6	28.6	28.2	22.8	25.2	22.2	24.8	23.4	25.7	23.7	23.1	26.6	25.6	27.7
Completed high school	28.7	32.2	32.7	30.7	27.5	24.7	25.4	23.0	22.7	24.8	25.5	23.5	25.6	25.6	26.0	26.8
Some college	27.7	32.7	33.8	30.9	24.0	24.9	23.4	24.6	24.4	25.2	24.2	25.1	24.5	27.5	26.3	25.5
Completed college	30.4	34.1	34.9	32.1	24.8	23.4	23.3	23.8	22.6	22.5	23.4	25.1	24.5	23.9	26.3	24.8
Graduate school	34.5	37.9	35.9	32.2	23.9	22.8	24.7	24.3	24.3	25.7	25.6	25.5	27.0	25.5	25.9	27.5
College Plans
None or under 4 years	26.3	28.4	29.0	29.8	26.3	23.2	25.2	22.9	23.4	22.5	23.2	22.5	25.1	25.3	25.3	26.9
Complete four years	31.5	36.3	36.2	31.6	25.1	24.0	23.8	24.2	23.7	24.9	24.8	25.0	24.7	25.8	26.2	25.7
	1976	1981	1986	1991	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
Used two substances in past 30 days	25.6	24.9	21.6	18.5	20.1	20.3	20.7	20.9	20.2	19.1	19.3	18.0	17.1	16.8	16.6	15.6
Gender
Male	28.7	26.8	23.4	20.0	22.5	22.0	22.0	22.5	21.7	21.2	21.2	18.9	18.5	18.2	18.9	16.8
Female	22.4	22.8	19.9	16.9	17.9	18.7	19.3	19.1	18.8	17.0	17.3	17.0	15.8	15.7	14.6	14.2
Race
White	25.9	25.8	23.1	20.6	21.8	22.0	23.0	23.0	22.3	21.6	21.5	20.0	19.1	18.6	18.6	17.3
Black	22.0	18.7	12.9	8.0	13.3	14.2	12.3	13.6	12.0	9.0	11.9	10.4	10.2	9.6	10.0	10.2
Parental Education1
Less than high school	26.7	23.8	19.8	19.5	18.1	19.5	18.4	18.6	20.1	18.5	16.6	16.6	16.1	14.1	13.5	15.3
Completed high school	26.5	24.6	21.3	19.3	21.2	20.9	20.1	22.0	21.5	20.0	19.2	18.7	18.5	17.7	17.3	16.9
Some college	25.1	25.2	22.9	18.5	20.7	19.7	20.6	21.3	19.7	20.0	19.9	18.5	17.0	17.7	17.4	16.6
Completed college	24.2	24.7	21.4	18.1	18.8	20.6	20.5	21.0	19.2	18.2	20.4	17.6	16.2	16.7	17.8	14.2
Graduate school	23.8	26.9	22.0	17.3	20.7	20.7	23.4	20.1	21.0	18.5	18.0	17.8	16.9	16.2	14.9	14.8
College Plans
None or under 4 years	28.0	26.6	23.5	23.0	24.4	25.3	22.6	24.2	24.3	24.2	24.7	22.1	21.4	21.1	20.8	19.9
Complete four years	23.0	23.6	20.2	16.6	18.6	19.0	20.2	19.6	19.1	17.5	17.8	17.0	15.8	15.9	15.6	14.5
	1976	1981	1986	1991	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
Used all three substances in past 30 days	20.2	17.9	15.2	10.2	14.2	14.8	16.7	15.7	15.8	14.5	13.7	13.1	12.0	12.0	11.0	10.4
Gender
Male	21.3	16.9	15.4	11.1	15.6	16.0	18.1	17.8	17.5	15.9	14.7	15.1	14.3	12.8	12.7	10.8
Female	18.9	18.6	14.8	9.2	12.7	13.3	15.0	13.5	13.9	13.1	12.8	11.1	9.8	11.1	9.2	9.6
Race
White	20.7	19.2	16.7	11.4	15.5	16.8	19.2	18.4	17.4	16.1	16.1	15.0	14.0	13.8	13.2	11.6
Black	15.1	9.1	6.5	2.7	6.7	6.2	6.8	6.9	7.2	7.5	5.2	5.2	4.7	4.9	4.0	5.7
Parental Education1
Less than high school	18.9	17.1	13.0	9.3	11.8	11.2	12.7	13.3	13.0	13.5	11.0	9.1	10.9	8.5	7.8	9.7
Completed high school	22.1	18.9	16.8	9.6	13.2	13.3	16.2	14.6	16.1	13.9	13.9	13.8	11.8	12.4	12.6	11.2
Some college	19.4	17.9	15.1	10.4	14.1	15.6	16.5	17.4	15.9	14.5	14.9	14.7	12.8	13.4	11.6	11.2
Completed college	20.6	17.4	14.5	10.1	15.1	15.6	18.6	15.4	15.7	14.7	13.7	12.3	12.3	11.9	11.0	9.4
Graduate school	19.1	15.1	14.2	12.2	16.2	15.4	16.8	16.1	17.1	14.3	12.2	13.0	10.0	10.6	9.8	10.1
College Plans
None or under 4 years	23.5	23.3	20.6	12.8	17.1	18.7	22.0	21.0	19.2	19.1	18.1	18.0	17.7	16.1	16.8	16.3
Complete four years	16.4	13.7	12.0	9.0	13.1	13.5	14.8	14.1	14.7	12.8	12.4	11.7	10.3	10.7	9.6	8.9
1Parental education is calculated by the Institute for Social Research as the average of the mother's and father's education.  Child Trends has relabeled these results to reflect the education level of the most educated parent.  In those circumstances where the gap between mothers' and fathers' education is more than one level, this results is an underestimate of the most educated parent's education level.
2 Indicates they have used only one of alcohol, cigarettes or illicit drugs.  Students may in fact have used multiple types of illicit drugs. For example, if a student had used both marijuana and cocaine, but had not used alcohol or cigarettes, they would still be categorized as having used only one substance.
Source: Original analysis by Child Trends of Monitoring the Future Data, 1976-2006