The majority of teenagers living in Denver are not using marijuana, according to new survey data compiled by the city. Of the teens who do, the number of daily users has increased slightly.

City officials surveyed 537 teens in Denver in 2019 to assess the effectiveness of the High Costs youth marijuana prevention program and released the results Wednesday.

Of survey respondents ages 13 to 17, 81% said they do not currently use marijuana. The survey included 18-year-olds for the first time and found 61% of them do not currently use marijuana.

In total, 57% of teens reported they have never used marijuana, down from 59% the previous year.

The number of both male and female teenagers who said they do not currently consume cannabis increased to 82% and 90%, respectively, in 2019 compared to 73% and 87% the previous year.

The number of teens who have used marijuana just one or two times increased to 24% in 2019, up from 21% in 2018. So did the number of daily users, up to 3% from 1% the previous year.

Teens who consumed marijuana on a monthly and weekly basis declined slightly, down one percentage point to 7% and 4%, respectively. And those in the “several times a week” category remained flat at 4%.

The survey also found that the number of teens who could recall the High Costs prevention campaign plummeted, to 56% in 2019 from 64% the year prior. Still, Ashley Kilroy, executive director of Denver Excise and Licenses, which manages the program, remained confident in its approach.

“After Denver became the first major city in America with legalized retail marijuana, many other cities and states turned to us to learn how we successfully regulated marijuana,” Kilroy said in a statement. “The verdict is in that scare tactics are not successful with youth. Providing them facts about marijuana is the most effective youth education and prevention approach.”

The High Costs campaign survey usage results mirror the latest Healthy Kids Colorado survey data from 2017, which found 81% of teenagers statewide do not consume marijuana. The Colorado Department of Public Health and Environment, which conducts the survey biennially, is expected to release its 2019 findings in June.