Monitoring the Future -- Trends in Marijuana Use
vs Alcohol Use Among College Students

Source: Monitoring the Future, Vol I (2009), Vol II, Tables 9-1, 9-2, and 9-3, pp. 268-271

Ratios of Marijuana Use vs Alcohol Use Among College Students (1980 - 2008)
Year	Lifetime	Past Year	Past Month
1980	0.69	0.57	0.42
1981	0.66	0.55	0.41
1982	0.64	0.48	0.32
1983	0.66	0.49	0.33
1984	0.63	0.45	0.29
1985	0.64	0.45	0.29
1986	0.61	0.45	0.28
1987	0.59	0.41	0.26
1988	0.57	0.39	0.22
1989	0.55	0.38	0.21
1990	0.53	0.33	0.19
1991	0.49	0.30	0.19
1992	0.48	0.32	0.20
1993	0.47	0.33	0.20
1994	0.48	0.35	0.22
1995	0.47	0.38	0.28
1996	0.51	0.40	0.26
1997	0.53	0.38	0.27
1998	0.56	0.42	0.27
1999	0.58	0.42	0.30
2000	0.59	0.41	0.30
2001	0.59	0.43	0.30
2002	0.58	0.42	0.29
2003	0.59	0.41	0.29
2004	0.58	0.41	0.28
2005	0.57	0.40	0.25
2006	0.55	0.37	0.26
2007	0.57	0.39	0.25
2008	0.55	0.39	0.25
Average	0.57	0.41	0.27

Other Available Trend and Comparison Data
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