Monitoring the Future -- Trends in Past Month Crack Use
vs Marijuana Use by Young Adults (1986 - 2008)

Ratios of Crack Use to Marijuana Use Among Young Adults -- Past Month Use (1986 - 2008)
Year	Ages 19 Use to 28	College Students	12th Grade Students
1986	--	--	--
1987	0.048	0.020	0.062
1988	0.067	0.030	0.089
1989	0.045	0.012	0.084
1990	0.029	0.007	0.050
1991	0.030	0.021	0.051
1992	0.030	0.007	0.050
1993	0.030	0.007	0.045
1994	0.021	0.007	0.042
1995	0.014	0.005	0.047
1996	0.020	0.006	0.046
1997	0.020	0.011	0.038
1998	0.020	0.011	0.044
1999	0.026	0.014	0.048
2000	0.025	0.015	0.046
2001	0.024	0.005	0.049
2002	0.018	0.015	0.056
2003	0.017	0.021	0.042
2004	0.018	0.021	0.050
2005	0.024	0.005	0.049
2006	0.018	0.015	0.056
2007	0.017	0.021	0.042
2008	0.018	0.021	0.050

Other Available Trend and Comparison Data
Click graphics to navigate