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Source: Monitoring the Future, Vol II (2009), Tables 9-1, 9-2, and 9-3, pp.268-271
| Ratios of Heroin Use vs Marijuana Use Among College Students (1980 - 2008) | |||
|---|---|---|---|
| Year | Lifetime | Past Year | Past Month |
| 1980 | 0.01 | 0.008 | 0.009 |
| 1981 | 0.01 | 0.004 | -- |
| 1982 | 0.01 | 0.002 | -- |
| 1983 | 0.00 | -- | -- |
| 1984 | 0.01 | 0.002 | -- |
| 1985 | 0.01 | 0.005 | -- |
| 1986 | 0.01 | 0.002 | -- |
| 1987 | 0.01 | 0.005 | 0.005 |
| 1988 | 0.01 | 0.006 | 0.006 |
| 1989 | 0.01 | 0.003 | 0.006 |
| 1990 | 0.01 | 0.003 | -- |
| 1991 | 0.01 | 0.004 | 0.007 |
| 1992 | 0.01 | 0.004 | -- |
| 1993 | 0.01 | 0.004 | -- |
| 1994 | 0.00 | 0.003 | -- |
| 1995 | 0.01 | 0.010 | 0.005 |
| 1996 | 0.02 | 0.012 | -- |
| 1997 | 0.02 | 0.009 | 0.011 |
| 1998 | 0.03 | 0.017 | 0.005 |
| 1999 | 0.02 | 0.006 | 0.005 |
| 2000 | 0.03 | 0.015 | 0.010 |
| 2001 | 0.02 | 0.011 | 0.005 |
| 2002 | 0.02 | 0.003 | -- |
| 2003 | 0.02 | 0.006 | -- |
| 2004 | 0.02 | 0.012 | 0.005 |
| 2005 | 0.01 | 0.009 | 0.006 |
| 2006 | 0.01 | 0.010 | 0.012 |
| 2007 | 0.01 | 0.006 | 0.006 |
| 2008 | 0.01 | 0.009 | -- |
| Average | 0.01 | 0.007 | 0.007 |
Other Available Trend and Comparison Data
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