Source: National Survey on Drug Use and Health
| Ratios of Tranquilizer Use vs Marijuana Use Among New Drug Use Initiates (1965 - 2003) | |||
|---|---|---|---|
| Year | Total | 18 or Older | 12 to 17 |
| 1965 | 0.08 | 0.07 | 0.09 |
| 1966 | 0.07 | -- | -- |
| 1967 | 0.08 | 0.10 | -- |
| 1968 | 0.08 | 0.11 | 0.03 |
| 1969 | 0.10 | 0.08 | 0.11 |
| 1970 | 0.08 | 0.07 | 0.09 |
| 1971 | 0.09 | 0.08 | 0.09 |
| 1972 | 0.12 | 0.15 | 0.09 |
| 1973 | 0.13 | 0.17 | 0.09 |
| 1974 | 0.14 | 0.18 | 0.12 |
| 1975 | 0.15 | 0.25 | 0.07 |
| 1976 | 0.15 | 0.22 | 0.11 |
| 1977 | 0.13 | 0.19 | 0.08 |
| 1978 | 0.12 | 0.21 | 0.06 |
| 1979 | 0.16 | 0.24 | 0.10 |
| 1980 | 0.15 | 0.25 | 0.09 |
| 1981 | 0.18 | 0.32 | 0.09 |
| 1982 | 0.18 | 0.34 | 0.07 |
| 1983 | 0.17 | 0.37 | 0.04 |
| 1984 | 0.22 | 0.48 | 0.07 |
| 1985 | 0.20 | 0.40 | 0.08 |
| 1986 | 0.19 | 0.37 | 0.08 |
| 1987 | 0.19 | 0.43 | 0.04 |
| 1988 | 0.24 | 0.57 | 0.05 |
| 1989 | 0.25 | 0.53 | 0.05 |
| 1990 | 0.25 | 0.47 | 0.09 |
| 1991 | 0.22 | 0.49 | 0.05 |
| 1992 | 0.23 | 0.49 | 0.06 |
| 1993 | 0.24 | 0.50 | 0.08 |
| 1994 | 0.19 | 0.42 | 0.07 |
| 1995 | 0.22 | 0.45 | 0.09 |
| 1996 | 0.27 | 0.54 | 0.11 |
| 1997 | 0.26 | 0.53 | 0.11 |
| 1998 | 0.34 | 0.75 | 0.15 |
| 1999 | 0.35 | 0.69 | 0.15 |
| 2000 | 0.47 | 1.03 | 0.19 |
| 2001 | 0.43 | 0.85 | 0.21 |
| 2002 | 0.47 | 1.02 | 0.22 |
| 2003 | 0.54 | 1.16 | 0.23 |
| Averages: | 0.30 | 0.63 | 0.11 |
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