Trends in Marijuana Use
Among 12th Grade Students (1975 - 2005)

Source: Monitoring the Future

Marijuana Use Among 12th Grade Students (1975 - 2005)
Year	Lifetime	Past Year	Past Month
1975	47.3	40.0	27.1
1976	52.8	44.5	32.2
1977	56.4	47.6	35.4
1978	59.2	50.2	37.1
1979	60.4	50.8	36.5
1980	60.3	48.8	33.7
1981	59.5	46.1	31.6
1982	58.7	44.3	28.5
1983	57.0	42.3	27.0
1984	54.9	40.0	25.2
1985	54.2	40.6	25.7
1986	50.9	38.8	23.4
1987	50.2	36.3	21.0
1988	47.2	33.1	18.0
1989	43.7	29.6	16.7
1990	40.7	27.0	14.0
1991	36.7	23.9	13.8
1992	32.6	21.9	11.9
1993	35.3	26.0	15.5
1994	38.2	30.7	19.0
1995	41.7	34.7	21.2
1996	44.9	35.8	21.9
1997	49.6	38.5	23.7
1998	49.1	37.5	22.8
1999	49.7	37.8	23.1
2000	48.8	36.5	21.6
2001	49.0	37.0	22.4
2002	47.8	36.2	21.5
2003	46.1	34.9	21.2
2004	45.7	34.3	19.9
2005	44.8	33.6	19.8
Averages:	48.8	37.4	23.6

Marijuana Use by Demographic Group

8th Grade Students 10th Grade Students 12th Grade Drug Use Overview

College Students Age 19 to 28 Initiation of Use