|
Source: Monitoring the Future, Vol II (2009), Table 5-1, pp. 148-150
| Ratios of Cocaine Use vs Alcohol and Marijuana Use Among 19 to 28 Year Olds -- Lifetime Use | ||
|---|---|---|
| Year | vs Alcohol | vs Marijuana |
| 1986 | 0.34 | 0.48 |
| 1987 | 0.31 | 0.44 |
| 1988 | 0.30 | 0.44 |
| 1989 | 0.27 | 0.41 |
| 1990 | 0.25 | 0.39 |
| 1991 | 0.22 | 0.36 |
| 1992 | 0.21 | 0.35 |
| 1993 | 0.18 | 0.30 |
| 1994 | 0.17 | 0.28 |
| 1995 | 0.15 | 0.26 |
| 1996 | 0.14 | 0.24 |
| 1997 | 0.13 | 0.22 |
| 1998 | 0.14 | 0.23 |
| 1999 | 0.14 | 0.23 |
| 2000 | 0.14 | 0.23 |
| 2001 | 0.15 | 0.24 |
| 2002 | 0.15 | 0.24 |
| 2003 | 0.17 | 0.26 |
| 2004 | 0.17 | 0.26 |
| 2005 | 0.16 | 0.25 |
| 2006 | 0.17 | 0.27 |
| 2007 | 0.17 | 0.26 |
| 2008 | 0.17 | 0.26 |
| Average | 0.19 | 0.30 |
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