BLOOMINGTON, Ind. (AP) — Indiana University researchers have found that smoking remains popular with young people in the state, but not in the form of traditional cigarettes.

This year’s Indiana Youth Survey determined that fewer high school students are using tobacco products. However, one in four of the state’s 12th graders had used an electronic vapor cigarette, also known as an e-cigarette, in the month before taking the survey.

The (Bloomington) Herald Times reports that the survey was distributed among more than 111,500 students in grades six through 12 at over 300 public and private schools in Indiana. It was the first time the survey included a question about the students’ use of e-cigarettes.

About 15 percent of students in grades seven to 12 said they used vaping products at least once in the month before taking the survey.