A massive study published this month in the Journal of Drug Issues found that the proportion of marijuana users who smoke daily has rapidly grown, and that many of those frequent users are poor and lack a high-school diploma.
Examining a decade of federal surveys of drug use conducted between 2002 and 2013, study authors Steven Davenport and Jonathan Caulkins paint one of the clearest pictures yet of the demographics of current marijuana use in the U.S. They found that the profile of marijuana users is much closer to cigarette smokers than alcohol drinkers, and that a handful of users consume much of the marijuana used in the U.S.
"In the early 1990s only one in nine past-month [marijuana] users reported using daily or near-daily," Davenport and Caulkins write. "Now it is fully one in three. Daily or near-daily users now account for over two-thirds of self-reported days of use (68%)."