U.S. college students are using marijuana at the highest rates in 35 years, according to a report released Thursday.
About 43% of full-time college students said they used some form of pot at least once in the past year, up from 38%, a University of Michigan survey found. About 25% said they did so in the previous month, up from 21%.
The latest figures are the highest levels seen in the annual survey since 1983.
About 6% of college students said they used marijuana 20 or more times in the past month. For adults the same age who weren’t enrolled in college, the figure was 11%.
“It’s the frequent use we’re most worried about” because it’s linked to poor academic performance and can be detrimental to mental health, said John Schulenberg, one of the Michigan researchers.
College-age adults are the biggest users of marijuana than any other age group. Use among high school students has been flat for a few years.