Fewer U.S. middle and high school students are smoking. The number has gone down significantly in recent years, however millions of teens still report using tobacco products.

In 2017, 3.6 million middle and high school students said they were currently using tobacco products, according to a new study by the Centers for Disease Control and Prevention. That number is down from 4.5 million in 2011.

Overall, nearly one in five high school students reported using tobacco in 2017, with e-cigarettes being the most popular product. 

CDC Director Robert Redfield said in a statement despite promising declines in numbers, far too many young people still report smoking.