PPT Slide

Percentage of 8th-Graders Who Have Used Marijuana: Monitoring the Future Study, 1999

1991 1992 1993 1994 1995 1996 1997 1998 1999

A 10.2% 11.2% 12.6% 16.7% 19.9% 23.1% 22.6% 22.2% 22.0%

B 6.2 7.2 9.2 13.0 15.8 18.3 17.7 16.9 16.5

C 3.2 3.7 5.1 7.8 9.1 11.3 10.2 9.7 9.7

D 0.2 0.2 0.4 0.7 0.8 1.5 1.1 1.1 1.4

A=Ever used

B=Used in past

C=Used in past month

D= Daily use in past month