Marijuana is now legal in Colorado. Find out which state has the highest rate of illicit drug use in the country.
Vermont has the highest rate of illicit drug use in the country, with 15 percent of residents saying they've used within the past month, according to 2010-2011 surveys from the Substance Abuse and Mental Health Services Administration. Using those figures, here are the 20 highest states in America:
iStock / MartiSaiz
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