Raising the drinking age in the 1980s slightly increased marijuana smoking among young people.

20世纪80年代法定饮酒年龄的提高造成年轻人中吸食大麻的人数出现了小幅度上涨。

It also was much greater than an increase in marijuana smoking during the 1970s.

它也远大于 1970 年代吸食大麻的增加。

Marijuana smoking is about the same level as it was the past few years.

吸食大麻的水平与过去几年大致相同。