Source: Monitoring the Future
| Ratios of Hallucinogen Use vs Marijuana Use and Alcohol Use Among Those Ages 19 to 28 -- Lifetime (1986 - 2004) | |||
|---|---|---|---|
| Year | Hallucinogen Use Rate (%) | Ratio vs Marijuana | Ratio vs Alcohol |
| 1986 | 18.5 | 0.28 | 0.20 |
| 1987 | 17.1 | 0.26 | 0.18 |
| 1988 | 17.0 | 0.27 | 0.18 |
| 1989 | 15.9 | 0.25 | 0.17 |
| 1990 | 16.1 | 0.27 | 0.17 |
| 1991 | 15.7 | 0.27 | 0.17 |
| 1992 | 15.7 | 0.28 | 0.17 |
| 1993 | 15.4 | 0.28 | 0.17 |
| 1994 | 15.4 | 0.29 | 0.17 |
| 1995 | 16.1 | 0.30 | 0.18 |
| 1996 | 16.4 | 0.31 | 0.18 |
| 1997 | 16.7 | 0.31 | 0.18 |
| 1998 | 17.4 | 0.32 | 0.19 |
| 1999 | 18.0 | 0.33 | 0.20 |
| 2000 | 18.4 | 0.33 | 0.20 |
| 2001 | 18.3 | 0.33 | 0.20 |
| 2002 | 19.6 | 0.35 | 0.22 |
| 2003 | 19.7 | 0.34 | 0.22 |
| 2004 | 19.3 | 0.34 | 0.22 |
| Averages: | 17.2 | 0.30 | 0.19 |
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