Although marijuana use had been declining among high school students for more than a decade, in recent years it has started to climb, in contrast to continuing declines in cigarette smoking and alcohol use. 尽管十年多以来,大麻在高中生中的使用率已经下降,但近年又开始出现攀升,与此同时,吸烟和喝酒的比例一直在下降。