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Table 8 Average initiation ages for entry level agents (N = 2498). This table is depicted by Figure 1 and emphasizes the rapid fall in age at initiation of cannabis after it first became available in high schools.

From: Long term marijuana users seeking medical cannabis in California (2001–2007): demographics, social characteristics, patterns of cannabis and other drug use of 4117 applicants

  Tobacco Alcohol Cannabis
1936–1940 16.07 16.43 26.39
1941–1945 15.86 15.89 21.12
1946–1950 14.98 16.18 18.64
1951–1955 14.88 15.79 16.58
1956–1960 14.8 15.25 15.87
1961–1965 14.74 14.71 15.66
1966–1970 15.28 14.84 14.92
1971–1975 15.08 15.04 15.68
1976–1980 14.99 15.22 15.15
1981–1985 14.29 14.66 14.32