WASHINGTON — Smoking and drinking among teenagers fell to new lows in 2015, new federal data show, as young Americans continued to shift away from the habits of their parents.

Just 9.6 percent of adolescents, ages 12 to 17, reported using alcohol in 2015, down from 17.6 percent in 2002, according to the data. Far fewer adolescents smoke every day: about 20 percent in 2015, down from 32 percent in 2002.

The numbers came from the Substance Abuse and Mental Health Services Administration, a federal agency that tracks addiction and mental health issues in the United States.

The annual survey is nationally representative and questions about 67,000 Americans, both youths and adults.