The nation’s drug users are getting younger, according to reports released Tuesday.

Teenage drug use has more than doubled since 1992, the Department of Health and Human Services said. Nearly 11% of 12-year-olds to 17-year-olds used drugs on a monthly basis last year, and that number has climbed steadily from a low of 5.3% in 1992.

While teenage drug use has increased, usage by older Americans has declined in the same period, and overall levels of drug use have remained flat, the reports said. An estimated 12.8 million Americans used illegal drugs last year, the same rate as in 1992.

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