Monitoring the Future -- Trends in Heroin Use
vs Marijuana Use Among 12th Grade Students

Source: Monitoring the Future, Vol I (2009), Tables 5-1, 5-2, and 5-3, pp.191-199

Ratios of Heroin Use vs Marijuana Use Among 12th Grade Students (1975 - 2008)
Year	Lifetime	Past Year	Past Month
1975	0.05	0.025	0.015
1976	0.03	0.018	0.006
1977	0.03	0.017	0.008
1978	0.03	0.016	0.008
1979	0.02	0.010	0.005
1980	0.02	0.010	0.006
1981	0.02	0.011	0.006
1982	0.02	0.014	0.007
1983	0.02	0.014	0.007
1984	0.02	0.013	0.012
1985	0.02	0.015	0.012
1986	0.02	0.013	0.009
1987	0.02	0.014	0.010
1988	0.02	0.015	0.011
1989	0.03	0.020	0.018
1990	0.03	0.019	0.014
1991	0.02	0.017	0.014
1992	0.04	0.027	0.025
1993	0.03	0.019	0.013
1994	0.03	0.020	0.016
1995	0.04	0.032	0.028
1996	0.04	0.028	0.023
1997	0.04	0.031	0.021
1998	0.04	0.027	0.022
1999	0.04	0.029	0.022
2000	0.05	0.041	0.032
2001	0.04	0.024	0.018
2002	0.04	0.028	0.023
2003	0.03	0.023	0.019
2004	0.03	0.026	0.025
2005	0.03	0.024	0.025
2006	0.03	0.025	0.022
2007	0.04	0.028	0.021
2008	0.03	0.022	0.021
Average	0.03	0.021	0.016

Other Available Trend and Comparison Data
Click graphics to navigate