Monitoring the Future -- Trends in Past Month Marijuana Use
by 8th, 10th & 12th Grade Students

Source: Monitoring the Future, Vol I (2009), Table 5-5b, pp. 210-213

Trends in Marijuana Use Among High School Students -- Past Month Use (1991 - 2008) ter>

Year	12th Grade	10th Grade	8th Grade
1991	13.8	8.7	3.2
1992	11.9	8.1	3.7
1993	15.5	10.9	5.1
1994	19.0	15.8	7.8
1995	21.2	17.2	9.1
1996	21.9	20.4	11.3
1997	23.7	20.5	10.2
1998	22.8	18.7	9.7
1999	23.1	19.4	9.7
2000	21.6	19.7	9.1
2001	22.4	19.8	9.2
2002	21.5	17.8	8.3
2003	21.2	17.0	7.5
2004	19.9	15.9	6.4
2005	19.8	15.2	6.6
2006	18.3	14.2	6.5
2007	18.8	14.2	5.7
2008	19.4	13.8	5.8

Drug Use Trends for Each Demographic Group
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8th Grade Students	10th Grade Students	12th Grade Students