TABLE B.2 1999 Lifetime and Past-Month Prevalence of Marijuana and Cocaine Use for 10th and 12th Graders

 

Lifetime Use

Past Month Use

Year in School

Drug

MTF

YRBSS

MTF

YRBSS

10th grade

Marijuana

40.9

49.1

19.4

27.8

Cocaine

7.7

9.9

1.8

3.7

12th grade

Marijuana

49.7

58.4

23.1

31.5

Cocaine

9.8

13.7

2.6

4.8

NOTE: MTF=Monitoring the Future. YRBSS=Youth Risk Behavior Surveillance System.

SOURCES: Monitoring the Future: National Results on Adolescent Drug Use, Overview of Key Findings. National Institute on Drug Abuse: Washington DC. Available on-line October 9, 2000 at http://monitoringthefuture.org/new.html; and Youth Risk Behavior Surveillance—1999. Centers for Disease Control: Washington DC. Available on-line October 9, 2000 at http://www.cdc.gov/mmwr/preview/mmwrhtml/ss4905a1.htm.



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