Percentage of U.S. twelfth grade students reporting past month use of cigarettes and marijuana, 1975 to 2011

• Year 1975: Cigarettes 36.7, Marijuana 27.1
• Year 1976: Cigarettes 38.8, Marijuana 32.2
• Year 1977: Cigarettes 38.4, Marijuana 35.4
• Year 1978: Cigarettes 36.7, Marijuana 37.1
• Year 1979: Cigarettes 34.4, Marijuana 36.5
• Year 1980: Cigarettes 30.5, Marijuana 33.7
• Year 1981: Cigarettes 29.4, Marijuana 31.6
• Year 1982: Cigarettes 30, Marijuana 28.5
• Year 1983: Cigarettes 30.3, Marijuana 27
• Year 1984: Cigarettes 29.3, Marijuana 25.2
• Year 1985: Cigarettes 30.1, Marijuana 25.7
• Year 1986: Cigarettes 29.6, Marijuana 23.4
• Year 1987: Cigarettes 29.4, Marijuana 21
• Year 1988: Cigarettes 28.7, Marijuana 18
• Year 1989: Cigarettes 28.6, Marijuana 16.7
• Year 1990: Cigarettes 29.4, Marijuana 14
• Year 1991: Cigarettes 28.3, Marijuana 13.8
• Year 1992: Cigarettes 27.8, Marijuana 11.9
• Year 1993: Cigarettes 29.9, Marijuana 15.5
• Year 1994: Cigarettes 31.2, Marijuana 19
• Year 1995: Cigarettes 33.5, Marijuana 21.2
• Year 1996: Cigarettes 34, Marijuana 21.9
• Year 1997: Cigarettes 36.5, Marijuana 23.7
• Year 1998: Cigarettes 35.1, Marijuana 22.8
• Year 1999: Cigarettes 34.6, Marijuana 23.1
• Year 2000: Cigarettes 31.4, Marijuana 21.6
• Year 2001: Cigarettes 29.5, Marijuana 22.4
• Year 2002: Cigarettes 26.7, Marijuana 21.5
• Year 2003: Cigarettes 24.4, Marijuana 21.2
• Year 2004: Cigarettes 25, Marijuana 19.9
• Year 2005: Cigarettes 23.2, Marijuana 19.8
• Year 2006: Cigarettes 21.6, Marijuana 18.3
• Year 2007: Cigarettes 21.6, Marijuana 18.8
• Year 2008: Cigarettes 20.4, Marijuana 19.4
• Year 2009: Cigarettes 20.1, Marijuana 20.6
• Year 2010: Cigarettes 19.2, Marijuana 21.4
• Year 2011*: Cigarettes 19.0, Marijuana 22.4

* The numbers for 2011 are estimated from the graphic.