
The number of “dual users” is also up: Teens who admit to using both marijuana and alcohol at least once a month has almost doubled -- from 3.6% in 1991 to 7.6% in 2017.
The number of “dual users” is also up: Teens who admit to using both marijuana and alcohol at least once a month has almost doubled -- from 3.6% in 1991 to 7.6% in 2017.