CNN.com - College towns lead in marijuana use - Jun 16, 2005: "Marijuana use
The regions with the 10 highest and lowest rates of marijuana use by residents 12 and over, according to a report by the Substance Abuse and Mental Health Services Administration:

Highest


Boston, 12.16 percent
Boulder, Colorado, 10.3
Southeast Massachusetts, 9.53
Portland, Ore., region, 9.48
Champlain Valley, Vermont, 9.37
San Francisco region, 9.24
Hawaii Island, 9.22
Central Massachusetts, 9
North Central California, 8.93
Washington, Rhode Island, 8.81

Lowest

Northwest Iowa, 2.28
Northeast Iowa, 2.53
North central Texas, 2.59
Central Iowa, 2.63
Lake region and south central North Dakota, 2.65
Northern Nebraska, 2.65
Southeast Oklahoma, 2.77
East-central South Dakota, 2.78
Badlands and west central North Dakota, 2.81
Central Nebraska, 2.88"