| Sex and Year | Total* | 8th grade | 10th grade | 12th grade |
|---|---|---|---|---|
| Both Sexes | ||||
| 2005 | 19.5 | 10.5 | 21.0 | 28.1 |
| 2004 | 20.5 | 11.4 | 22.0 | 29.2 |
| 2003 | 20.4 | 11.9 | 22.2 | 27.9 |
| 2002 | 20.8 | 12.4 | 22.4 | 28.6 |
| 2001 | 22.0 | 13.2 | 24.9 | 29.7 |
| 2000 | 22.8 | 14.1 | 26.2 | 30.0 |
| 1999 | 23.3 | 15.2 | 25.6 | 30.8 |
| 1998 | 22.7 | 13.7 | 24.3 | 31.5 |
| 1997 | 23.1 | 14.5 | 25.1 | 31.3 |
| 1996 | 23.0 | 15.6 | 24.8 | 30.2 |
| 1995 | 22.5 | 14.5 | 24.0 | 29.8 |
| 1994 | 21.9 | 14.5 | 23.6 | 28.2 |
| 1993 | 21.0 | 13.5 | 23.0 | 27.5 |
| 1992 | 20.4 | 13.4 | 21.1 | 27.9 |
| 1991 | 21.5 | 12.9 | 22.9 | 29.8 |
| Male | ||||
| 2005 | 21.2 | 10.2 | 22.0 | 33.4 |
| 2004 | 22.3 | 10.8 | 23.8 | 34.3 |
| 2003 | 22.7 | 12.2 | 23.2 | 34.2 |
| 2002 | 22.8 | 12.5 | 23.8 | 34.2 |
| 2001 | 25.3 | 13.7 | 28.6 | 36.0 |
| 2000 | 25.9 | 14.4 | 29.8 | 36.7 |
| 1999 | 27.3 | 16.4 | 29.7 | 38.1 |
| 1998 | 26.0 | 14.4 | 26.7 | 39.2 |
| 1997 | 26.6 | 15.3 | 28.6 | 37.9 |
| 1996 | 26.2 | 16.5 | 27.2 | 37.0 |
| 1995 | 25.7 | 15.1 | 26.3 | 36.9 |
| 1994 | 26.7 | 16.0 | 28.5 | 37.0 |
| 1993 | 24.8 | 14.8 | 26.5 | 34.6 |
| 1992 | 23.8 | 13.9 | 23.7 | 35.6 |
| 1991 | 25.6 | 14.3 | 26.4 | 37.8 |
| Female | ||||
| 2005 | 17.5 | 10.6 | 19.9 | 22.7 |
| 2004 | 18.5 | 11.8 | 20.2 | 24.2 |
| 2003 | 18.1 | 11.6 | 21.2 | 22.1 |
| 2002 | 18.5 | 12.1 | 21.0 | 23.0 |
| 2001 | 18.8 | 12.4 | 21.4 | 23.7 |
| 2000 | 19.5 | 13.6 | 22.5 | 23.5 |
| 1999 | 19.4 | 13.9 | 21.8 | 23.6 |
| 1998 | 19.3 | 12.7 | 22.2 | 24.0 |
| 1997 | 19.5 | 13.5 | 21.7 | 24.4 |
| 1996 | 19.8 | 14.5 | 22.3 | 23.5 |
| 1995 | 19.4 | 13.9 | 21.5 | 23.0 |
| 1994 | 17.3 | 13.0 | 18.7 | 20.2 |
| 1993 | 17.1 | 12.3 | 19.3 | 20.7 |
| 1992 | 17.0 | 12.8 | 18.6 | 20.3 |
| 1991 | 17.1 | 11.4 | 19.5 | 21.2 |
*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.