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The prevalence of past-year marijuana use climbed to 9.5% of adults in 2012-2013 from 4.1% in 2001-2002, with increases particularly notable among women and individuals who were black, Hispanic, living in the South, middle-aged or older, according to an article published online by JAMA Psychiatry. Via JAMA Psychiatry. Posted October 21, 2015.
