The nation's high school seniors are using fewer drugs than any class since 1975, a report from the National Institute on Drug Abuse showed.
Researchers said they were particularly encouraged by results showing a drop in cocaine use for the second year in a row, and the beginnings of a reversal in the soaring use of crack, an inexpensive, refined form of cocaine.
However, the war against drugs is far from over, with more than half of all students using an illegal substance at least once before graduating, said Charles R. Schuster, NIDA director. Moreover, drug use remains at a very high level among high school dropouts, he said.
The survey polled 16,300 high school seniors from 135 schools nationwide.