ANY ILLICIT DRUG: a Trends in Lifetime, Annual, and 30-Day Prevalence of Use in Grades 8, 10, and 12

(Entries are Percentages)

Lifetime Graph
Annual Graph
30-Day Graph
  1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020   2019 -
2020
Change
  2015 -
2020
Change
Proportional
Change
  Peak year -
2020
Change
Proportional
Change
  Low year -
2020
Change
Proportional
Change
Lifetime 8th Grade . . . . . . . . . . . . . . . 18.7 20.6 22.5 25.7 28.5 31.2 29.4 29.0 28.3 26.8 26.8 24.5 22.8 21.5 21.4 20.9 19.0 19.6 19.9 21.4 20.1 18.5 21.1 20.3 20.5 17.2 18.2 18.7 20.4 21.3 | 0.8 | 0.8 3.8 | 0.0 0.0 | 0.0 0.0
  10th Grade . . . . . . . . . . . . . . . 30.6 29.8 32.8 37.4 40.9 45.4 47.3 44.9 46.2 45.6 45.6 44.6 41.4 39.8 38.2 36.1 35.6 34.1 36.0 37.0 37.7 36.8 39.1 37.4 34.7 33.7 34.3 36.3 37.5 37.3 | -0.3 | 2.5 7.3 | -1.8 -4.6 | 3.6 10.7
  12th Grade 58.3 61.6 64.1 65.1 65.4 65.6 64.4 62.9 61.6 60.6 57.6 56.6 53.9 50.9 47.9 44.1 40.7 42.9 45.6 48.4 50.8 54.3 54.1 54.7 54.0 53.9 53.0 51.1 51.1 50.4 48.2 46.8 47.4 46.7 48.2 49.9 49.1 49.8 49.1 48.9 48.3 48.9 47.8 47.4 46.6 | -0.8 | -2.3 -4.8 | -3.3 -6.5 | 0.0 0.0
Last 12 Months 8th Grade . . . . . . . . . . . . . . . 11.3 12.9 15.1 18.5 21.4 23.6 22.1 21.0 20.5 19.5 19.5 17.7 16.1 15.2 15.5 14.8 13.2 14.1 14.5 16.0 14.7 13.4 15.2 14.6 14.8 12.0 12.9 13.4 14.8 15.6 | 0.7 | 0.8 5.1 | 0.0 0.0 | 0.0 0.0
  10th Grade . . . . . . . . . . . . . . . 21.4 20.4 24.7 30.0 33.3 37.5 38.5 35.0 35.9 36.4 37.2 34.8 32.0 31.1 29.8 28.7 28.1 26.9 29.4 30.2 31.1 30.1 32.1 29.9 27.9 26.8 27.8 29.9 31.0 30.4 | -0.7 | 2.5 9.0 | -1.7 -5.3 | 3.6 13.5
  12th Grade 48.1 51.1 53.8 54.2 53.1 52.1 49.4 47.4 45.8 46.3 44.3 41.7 38.5 35.4 32.4 29.4 27.1 31.0 35.8 39.0 40.2 42.4 41.4 42.1 40.9 41.4 41.0 39.3 38.8 38.4 36.5 35.9 36.6 36.5 38.3 40.0 39.7 40.1 38.7 38.6 38.3 39.9 38.8 38.0 36.8 | -1.2 | -1.7 -4.5 | -3.3 -8.2 | 0.0 0.0
Last 30 Days 8th Grade . . . . . . . . . . . . . . . 5.7 6.8 8.4 10.9 12.4 14.6 12.9 12.1 12.2 11.9 11.7 10.4 9.7 8.4 8.5 8.1 7.4 7.6 8.1 9.5 8.5 7.7 8.7 8.3 8.1 6.9 7.0 7.3 8.5 8.7 | 0.2 | 0.6 7.8 | 0.0 0.0 | 0.0 0.0
  10th Grade . . . . . . . . . . . . . . . 11.6 11.0 14.0 18.5 20.2 23.2 23.0 21.5 22.1 22.5 22.7 20.8 19.5 18.3 17.3 16.8 16.9 15.8 17.8 18.5 19.2 18.6 19.2 18.5 16.5 15.9 17.2 18.3 19.8 18.2 | -1.6 | 1.7 10.3 | -1.6 -8.3 | 0.0 0.0
  12th Grade 34.2 37.6 38.9 38.9 37.2 36.9 32.5 29.2 29.1 29.6 27.1 24.6 21.3 19.7 17.2 16.4 14.4 18.3 21.9 23.8 24.6 26.2 25.6 25.9 24.9 25.7 25.4 24.1 23.4 23.1 21.5 21.9 22.3 23.3 23.8 25.2 25.2 25.2 23.7 23.6 24.4 24.9 24.0 23.7 22.2 | -1.5 | -1.4 -5.9 | -3.0 -11.8 | 0.0 0.0

Source: The Monitoring the Future study, the University of Michigan.
Due to changes in the amphetamine questions 2013 data differ slightly from data for previous years.
See notes o and r for details on the changes to the amphetamine questions.
The peak year prevalence, 2013 and following, is noted in BOLD. The lowest prevalence after the peak is underlined.
For notes referenced in the title and a table of Ns click here: Notes
*** = p < 0.001 ** = p < 0.01 * = p < 0.05