The number of Americans who say they smoke pot has more than doubled between 2,000 and 2013.
A government-funded study looking at data on alcohol and drug use from 2001-2002 and 2012-2013 finds marijuana use went up from four to nine and a half percent.
And with that increase. there was in increase in reported abuse as well with nearly three out of every ten marijuana users saying they had a marijuana use disorder.
Researchers say the findings show while the public increasingly sees marijuana as a harmless drug, it does involve some risks.
A spokesperson for the National Organization for the Reform of Marijuana Law says comparing old and new statistics can be misleading since it is a possibility people are just being more honest about their marijuana use.
Findings appear in the journal ‘JAMA Psychiatry.’