Monitoring the Future -- Trends in Lifetime Hallucinogen Use
vs Marijuana Use by Young Adults (1986 - 2008)

Source: Monitoring the Future, Vols I & II (2009)

Ratios of Hallucinogen Use to Marijuana Use Among Young Adults -- Lifetime Use (1986 - 2008)
Year	Ages 19 Use to 28	College Students	12th Grade Students
1986	0.28	0.19	0.19
1987	0.26	0.20	0.21
1988	0.27	0.19	0.19
1989	0.25	0.21	0.22
1990	0.27	0.23	0.23
1991	0.27	0.24	0.26
1992	0.28	0.27	0.28
1993	0.28	0.28	0.31
1994	0.29	0.24	0.30
1995	0.30	0.31	0.30
1996	0.31	0.28	0.31
1997	0.31	0.30	0.30
1998	0.32	0.30	0.29
1999	0.33	0.29	0.28
2000	0.33	0.28	0.27
2001	0.33	0.29	0.30
2002	0.35	0.27	0.25
2003	0.34	0.29	0.23
2004	0.34	0.24	0.21
2005	0.33	0.29	0.30
2006	0.35	0.27	0.25
2007	0.34	0.29	0.23
2008	0.34	0.24	0.21

Other Available Trend and Comparison Data
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