Skolelevers drogvanor - 2016, årskurs 9

Since 1971, a national drug habit survey has been conducted among Swedish ninth graders. From 2004, annual survey are also being conducted among students in the second year of...

自1971年起，瑞典便持续针对九年级学生开展全国性药物使用习惯调查。自2004年起，同时还针对……阶段二年级的学生开展年度调查。