Source: Drug Abuse Warning Network (2003 Update)
| Year | White | Black | Hispanic | Not Tabulated | Unknown |
| 1995 | 37.5 | 38.9 | 14.1 | 0.5 | 8.9 |
| 1996 | 33.8 | 38.8 | 16.1 | 0.6 | 10.7 |
| 1997 | 36.6 | 37.5 | 12.9 | 0.9 | 12.1 |
| 1998 | 37.0 | 36.5 | 15.1 | 0.8 | 10.5 |
| 1999 | 38.7 | 34.9 | 14.3 | 0.5 | 11.6 |
| 2000 | 40.5 | 32.6 | 15.8 | 0.4 | 10.7 |
| 2001 | 43.1 | 30.8 | 15.1 | 0.4 | 10.5 |
| 2002 | 42.7 | 30.7 | 13.7 | 0.5 | 12.4 |