Source: Monitoring the Future
| Ratios of Cocaine Use vs Marijuana Use and Alcohol Use Among Those Ages 19 to 28 -- Past Year (1986 - 2004) | |||
|---|---|---|---|
| Year | Cocaine Use Rate (%) | Ratio vs Marijuana | Ratio vs Alcohol |
| 1986 | 19.7 | 0.54 | 0.22 |
| 1987 | 15.7 | 0.45 | 0.18 |
| 1988 | 13.8 | 0.43 | 0.16 |
| 1989 | 10.8 | 0.37 | 0.12 |
| 1990 | 8.6 | 0.33 | 0.10 |
| 1991 | 6.2 | 0.26 | 0.07 |
| 1992 | 5.7 | 0.23 | 0.07 |
| 1993 | 4.7 | 0.19 | 0.06 |
| 1994 | 4.3 | 0.17 | 0.05 |
| 1995 | 4.4 | 0.17 | 0.05 |
| 1996 | 4.1 | 0.15 | 0.05 |
| 1997 | 4.6 | 0.17 | 0.05 |
| 1998 | 4.9 | 0.18 | 0.06 |
| 1999 | 5.4 | 0.20 | 0.06 |
| 2000 | 5.4 | 0.19 | 0.06 |
| 2001 | 5.8 | 0.20 | 0.07 |
| 2002 | 5.8 | 0.20 | 0.07 |
| 2003 | 6.6 | 0.23 | 0.08 |
| 2004 | 7.1 | 0.24 | 0.08 |
| Averages: | 7.6 | 0.26 | 0.09 |
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