High school seniors using cannabis dropped from 50.1% in 1978 to 36% in 1987, to 12% in 1991 and the percentage of students using other drugs decreased similarly.
Число учащихся старших школ, употребляющих марихуану снизилось с 50,1 % в 1978 до 36 % в 1987, и до 12 % в 1991.