Source: Monitoring the Future
| Ratios of LSD Use vs Marijuana Use and Alcohol Use Among 10th Grade Students -- Past Year (1991 - 2005) | |||
|---|---|---|---|
| Year | LSD Use Rate (%) | Ratio vs Marijuana | Ratio vs Alcohol |
| 1991 | 3.7 | 0.22 | 0.05 |
| 1992 | 4.0 | 0.26 | 0.06 |
| 1993 | 4.2 | 0.22 | 0.07 |
| 1994 | 5.2 | 0.21 | 0.08 |
| 1995 | 6.5 | 0.23 | 0.10 |
| 1996 | 6.9 | 0.21 | 0.11 |
| 1997 | 6.7 | 0.19 | 0.10 |
| 1998 | 5.9 | 0.19 | 0.09 |
| 1999 | 6.0 | 0.19 | 0.09 |
| 2000 | 5.1 | 0.16 | 0.08 |
| 2001 | 4.1 | 0.13 | 0.06 |
| 2002 | 2.6 | 0.09 | 0.04 |
| 2003 | 1.7 | 0.06 | 0.03 |
| 2004 | 1.6 | 0.06 | 0.03 |
| 2005 | 1.5 | 0.06 | 0.03 |
| Averages: | 4.6 | 0.17 | 0.07 |
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