MARIJUANA: Trends in Disapproval of Drug Use in Grades 8, 10, and 12

(Percentages saying disapprove or strongly disapprove)

1 or 2 Graph
Occasionally Graph
Regularly 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   2018 -
2019
Change		   2014 -
2019
Change		 Proportional
Change		   Peak year -
2019
Change		 Proportional
Change		   Low year -
2019
Change		 Proportional
Change
Trying 1 or 2 times 8th Grade . . . . . . . . . . . . . . . 84.6 82.1 79.2 72.9 70.7 67.5 67.6 69.0 70.7 72.5 72.4 73.3 73.8 75.9 75.3 76.0 78.7 76.6 75.3 73.5 74.4 75.1 72.0 70.5 70.3 70.1 67.3 64.5 62.3 | -2.2 | -8.2*** -11.6 | -22.3*** -26.4 | 0.0 0.0
  10th Grade . . . . . . . . . . . . . . . 74.6 74.8 70.3 62.4 59.8 55.5 54.1 56.0 56.2 54.9 54.8 57.8 58.1 60.4 61.3 62.5 63.9 64.5 60.1 59.2 58.5 56.2 53.2 53.8 52.7 52.6 48.1 47.9 46.0 | -1.9 | -7.8*** -14.5 | -28.8*** -38.5 | 0.0 0.0
  12th Grade 38.4 33.4 33.4 34.2 39.0 40.0 45.5 46.3 49.3 51.4 54.6 56.6 60.8 64.6 67.8 68.7 69.9 63.3 57.6 56.7 52.5 51.0 51.6 48.8 52.5 49.1 51.6 53.4 52.7 55.0 55.6 58.6 55.5 54.8 51.6 51.3 48.8 49.1 48.0 45.5 43.1 39.0 41.1 34.1 | -7.0** | -13.8*** -28.8 | -35.8*** -51.2 | 0.0 0.0
Using ocassionally 8th Grade . . . . . . . . . . . . . . . 89.5 88.1 85.7 80.9 79.7 76.5 78.1 78.4 79.3 80.6 80.6 80.9 81.5 83.1 82.4 82.2 84.5 82.6 81.9 79.9 81.1 81.6 78.8 77.7 77.5 77.5 75.5 73.1 70.9 | -2.2 | -6.8*** -8.8 | -18.6*** -20.8 | 0.0 0.0
  10th Grade . . . . . . . . . . . . . . . 83.8 83.6 79.4 72.3 70.0 66.9 66.2 67.3 68.2 67.2 66.2 68.3 68.4 70.8 71.9 72.6 73.3 73.6 69.2 68.0 67.9 65.7 62.1 62.9 62.6 61.9 58.1 57.4 55.0 | -2.4 | -7.9*** -12.5 | -28.8*** -34.3 | 0.0 0.0
  12th Grade 47.8 44.3 43.5 45.3 49.7 52.6 59.1 60.7 63.5 65.8 69.0 71.6 74.0 77.2 80.5 79.4 79.7 75.5 68.9 66.7 62.9 63.2 64.4 62.5 65.8 63.2 63.4 64.2 65.4 67.8 69.3 70.2 67.3 65.6 62.0 60.9 59.1 58.9 56.7 52.9 50.5 46.7 49.2 41.4 | -7.8** | -15.3*** -26.9 | -39.1*** -48.6 | 0.0 0.0
Using regularly 8th Grade . . . . . . . . . . . . . . . 92.1 90.8 88.9 85.3 85.1 82.8 84.6 84.5 84.5 85.3 84.5 85.3 85.7 86.8 86.3 86.1 87.7 86.8 85.9 84.3 85.7 85.6 83.8 82.2 82.2 82.3 81.2 79.3 77.5 | -1.8 | -4.7** -5.7 | -14.6*** -15.8 | 0.0 0.0
  10th Grade . . . . . . . . . . . . . . . 90.4 90.0 87.4 82.2 81.1 79.7 79.7 80.1 79.8 79.1 78.0 78.6 78.8 81.3 82.0 82.5 82.4 83.0 79.9 78.7 78.8 77.3 73.8 74.6 74.3 73.5 70.2 69.7 67.4 | -2.3 | -7.3*** -9.7 | -23.0*** -25.5 | 0.0 0.0
  12th Grade 69.5 65.5 67.5 69.2 74.6 77.4 80.6 82.5 84.7 85.5 86.6 89.2 89.3 89.8 91.0 89.3 90.1 87.6 82.3 81.9 80.0 78.8 81.2 78.6 79.7 79.3 78.3 78.7 80.7 82.0 82.2 83.3 79.6 80.3 77.7 77.5 77.8 74.5 73.4 70.7 68.5 64.7 66.7 63.4 | -3.4 | -10.1*** -13.7 | -27.6*** -30.4 | 0.0 0.0

Source: The Monitoring the Future study, the University of Michigan.
Answer alternatives were: (1) Don't disapprove, (2) Disapprove, (3) Strongly disapprove. Percentages are shown for categories (2) and (3) combined.
For grades 8 and 10, beginning in 2012, data based on two thirds of N indicated.
The year with the highest percentage of those disapproving is noted in bold. The year with the lowest percentage after that peak is underlined.
For a table of Ns click here: Notes
*** = p < 0.001 ** = p < 0.01 * = p < 0.05