Graphed as percentage of population age 12 and older
| Sources: | National Survey on Drug Use and Health National Household Survey on Drug Abuse |
| Multiple Years | |
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| Marijuana Use Among Those 12 and Older (Number of Users) | |||
|---|---|---|---|
| Year | Ever Used | Past Year | Past Month |
| 1979 | 50,322,000 | 29,869,000 | 23,790,000 |
| 1982 | 53,312,000 | 29,685,000 | 21,507,000 |
| 1985 | 56,547,000 | 26,145,000 | 18,641,000 |
| 1988 | 60,755,000 | 19,492,000 | 12,353,000 |
| 1991 | 61,900,000 | 18,067,000 | 10,366,000 |
| 1992 | 62,075,000 | 16,322,000 | 9,676,000 |
| 1993 | 64,149,000 | 17,510,000 | 9,610,000 |
| 1994 | 65,229,000 | 17,813,000 | 10,112,000 |
| 1995 | 65,545,000 | 17,755,000 | 9,842,000 |
| 1996 | 68,571,000 | 18,398,000 | 10,095,000 |
| 1997 | 71,112,000 | 19,446,000 | 11,109,000 |
| 1998 | 72,070,000 | 18,710,000 | 11,016,000 |
| 1999 | 76,428,000 | 19,102,000 | 10,458,000 |
| 2000 | 76,321,000 | 18,589,000 | 10,714,000 |
| 2001 | 83,272,000 | 21,086,000 | 12,122,000 |
| 2002 | 94,946,000 | 25,755,000 | 14,584,000 |
| 2003 | 96,611,000 | 25,231,000 | 14,638,000 |
| 2004 | 96,772,000 | 25,451,000 | 14,576,000 |
| 2005 | 97,545,000 | 25,375,000 | 14,626,000 |
| 2006 | 97,825,000 | 25,378,000 | 14,813,000 |