Teen drinking has dropped in recent decades, but still about one-third of U.S. high schoolers say they drink alcohol, and one in six say they binge drink, according to a new report.

The study, from the Centers for Disease Control and Prevention, analyzed information from a yearly survey of high school students, conducted from 1991 to 2015.

In 2015, about 33 percent of high schoolers said they consumed at least one alcoholic drink in the last 30 days. That’s down from 51 percent of high schoolers who reported drinking alcohol in the last 30 days in the 1991 survey.