A new report from John Hopkins says more people are using e-cigarettes, specifically young adults and students.

Researchers say about 11 million adults used e-cigarettes in 2016, but that jumped to nearly 14 million two years later.

The report also says more people were vaping on a daily basis, suggesting that more users are becoming dependent on e-cigarettes rather than merely experimenting with them.  The study is published in Tuesday’s edition of Jama Internal Medicine.