| Sex and Year | Total* | 8th grade | 10th grade | 12th grade |
|---|---|---|---|---|
| Both Sexes | ||||
| 2005 | 32.0 | 17.1 | 33.2 | 47.0 |
| 2004 | 33.4 | 18.6 | 35.2 | 48.0 |
| 2003 | 33.9 | 19.7 | 35.4 | 47.5 |
| 2002 | 33.9 | 19.6 | 35.4 | 48.6 |
| 2001 | 35.8 | 21.5 | 39.0 | 49.8 |
| 2000 | 36.7 | 22.4 | 41.0 | 50.0 |
| 1999 | 37.6 | 24.0 | 40.0 | 51.0 |
| 1998 | 37.3 | 23.0 | 38.8 | 52.0 |
| 1997 | 38.4 | 24.5 | 40.1 | 52.7 |
| 1996 | 38.4 | 26.2 | 40.4 | 50.8 |
| 1995 | 37.8 | 24.6 | 38.8 | 51.3 |
| 1994 | 38.0 | 25.5 | 39.2 | 50.1 |
| 1993 | 37.2 | 24.3 | 38.2 | 48.6 |
| 1992 | 38.5 | 26.1 | 39.9 | 51.3 |
| 1991 | 40.0 | 25.1 | 42.8 | 54.0 |
| Male | ||||
| 2005 | 32.5 | 16.2 | 32.8 | 50.7 |
| 2004 | 34.3 | 17.9 | 36.3 | 51.1 |
| 2003 | 34.9 | 19.4 | 35.3 | 51.7 |
| 2002 | 34.6 | 19.1 | 35.3 | 52.3 |
| 2001 | 38.2 | 22.3 | 41.1 | 54.7 |
| 2000 | 38.5 | 22.5 | 43.3 | 54.0 |
| 1999 | 39.9 | 24.8 | 42.3 | 55.3 |
| 1998 | 39.6 | 24.0 | 40.0 | 57.3 |
| 1997 | 40.5 | 25.2 | 42.5 | 56.2 |
| 1996 | 40.5 | 26.6 | 42.6 | 54.8 |
| 1995 | 39.6 | 25.0 | 39.7 | 55.7 |
| 1994 | 41.3 | 26.5 | 43.5 | 55.5 |
| 1993 | 39.4 | 25.3 | 40.6 | 54.2 |
| 1992 | 40.5 | 26.3 | 41.6 | 55.8 |
| 1991 | 42.8 | 26.3 | 45.5 | 58.4 |
| Female | ||||
| 2005 | 31.2 | 17.9 | 33.6 | 43.3 |
| 2004 | 32.1 | 19.0 | 34.0 | 45.1 |
| 2003 | 32.6 | 19.8 | 35.3 | 43.8 |
| 2002 | 33.0 | 20.0 | 35.7 | 45.1 |
| 2001 | 33.3 | 20.6 | 36.8 | 45.1 |
| 2000 | 34.6 | 22.0 | 38.6 | 46.1 |
| 1999 | 35.3 | 23.3 | 38.1 | 46.8 |
| 1998 | 34.9 | 21.9 | 37.7 | 46.9 |
| 1997 | 36.3 | 23.9 | 37.9 | 48.9 |
| 1996 | 36.3 | 25.8 | 38.3 | 46.9 |
| 1995 | 36.0 | 24.0 | 37.8 | 47.0 |
| 1994 | 34.8 | 24.7 | 34.8 | 45.2 |
| 1993 | 35.0 | 23.7 | 35.6 | 43.4 |
| 1992 | 36.5 | 25.9 | 38.3 | 46.8 |
| 1991 | 37.0 | 23.8 | 40.2 | 49.0 |
*Estimates for 8th–12th grades combined are calculated by AEDS using the MTF public-use data.
NOTE: Standard errors are not available.
SOURCE: Johnston, L.D., O'Malley, P.M., Bachman, J.G., & Shulenberg, J.E. (2006). Monitoring the Future national survey results on drug use, 1975–2005. Volume I: Secondary school students (NIH Publication No. 06-5883). Bethesda, MD: National Institute on Drug Abuse, 684 pp.