A series of national surveys of U.S. college students, as part of the University of Michigan’s Monitoring the Future study, shows that marijuana use has been growing slowly on the nation’s campuses since 2006.
Daily or near-daily marijuana use was reported by 5.9 percent of college students in 2014–the highest rate since 1980, the first year that complete college data were available in the study.
This rate of use is up from 3.5 percent in 2007. In other words, one in every 17 college students is smoking marijuana on a daily or near-daily basis, defined as use on 20 or more occasions in the prior 30 days.
Other measures of marijuana use have also shown an increase: The percent using marijuana once or more in the prior 30 days rose from 17 percent in 2006 to 21 percent in 2014.
Use in the prior 12 months rose from 30 percent in 2006 to 34 percent in 2014. Both of these measures leveled in 2014.
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