More than 70 percent of 12- to 17-year-olds who were heavy drinkers in 2011 (i.e., consumed at least five drinks on the same occasion on at least 5 days in the past 30 days) also were current illicit drug users.

More than 44 percent of 12- to 17-year-olds who were binge drinkers also were current illicit drug users.