Monitoring the Future -- Trends in Marijuana Use
vs Alcohol Use Among 8th Grade Students

Source: Monitoring the Future, Vol I (2009), Tables 5-5a, 5-5b and 5-5c, pp. 202-13

Ratios of Marijuana Use vs Alcohol Use Among 8th Grade Students (1991 - 2008)
Year	Lifetime	Past Year	Past Month
1991	0.15	0.11	0.13
1992	0.16	0.13	0.14
1993	0.23	0.20	0.21
1994	0.30	0.28	0.31
1995	0.37	0.35	0.37
1996	0.42	0.39	0.43
1997	0.42	0.39	0.42
1998	0.42	0.39	0.42
1999	0.42	0.38	0.40
2000	0.39	0.36	0.41
2001	0.40	0.37	0.43
2002	0.41	0.38	0.42
2003	0.38	0.34	0.38
2004	0.37	0.32	0.34
2005	0.40	0.36	0.39
2006	0.39	0.35	0.38
2007	0.37	0.32	0.36
2008	0.38	0.34	0.36

Other Available Trend and Comparison Data
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