NEW YORK (AP) — 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.

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