Source: Monitoring the Future
| Ratios of Tranquilizer Use vs Marijuana Use and Alcohol Use Among College Students -- Past Year (1980 - 2004) | |||
|---|---|---|---|
| Year | Tranquilizer Use Rate (%) | Ratio vs Marijuana | Ratio vs Alcohol |
| 1980 | 6.9 | 0.13 | 0.08 |
| 1981 | 4.8 | 0.09 | 0.05 |
| 1982 | 4.7 | 0.11 | 0.05 |
| 1983 | 4.6 | 0.10 | 0.05 |
| 1984 | 3.5 | 0.09 | 0.04 |
| 1985 | 3.6 | 0.09 | 0.04 |
| 1986 | 4.4 | 0.11 | 0.05 |
| 1987 | 3.8 | 0.10 | 0.04 |
| 1988 | 3.1 | 0.09 | 0.03 |
| 1989 | 2.6 | 0.08 | 0.03 |
| 1990 | 3.0 | 0.10 | 0.03 |
| 1991 | 2.4 | 0.09 | 0.03 |
| 1992 | 2.9 | 0.10 | 0.03 |
| 1993 | 2.4 | 0.09 | 0.03 |
| 1994 | 1.8 | 0.06 | 0.02 |
| 1995 | 2.9 | 0.09 | 0.03 |
| 1996 | 2.8 | 0.08 | 0.03 |
| 1997 | 3.8 | 0.12 | 0.05 |
| 1998 | 3.9 | 0.11 | 0.05 |
| 1999 | 3.8 | 0.11 | 0.05 |
| 2000 | 4.2 | 0.12 | 0.05 |
| 2001 | 5.1 | 0.14 | 0.06 |
| 2002 | 6.7 | 0.19 | 0.08 |
| 2003 | 6.9 | 0.20 | 0.08 |
| 2004 | 6.7 | 0.20 | 0.08 |
| Averages: | 3.9 | 0.12 | 0.05 |
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