| http://www.w3.org/ns/prov#value | - Data Years Available: 1990; biennially since 1991Periodicity: BiennialMode of Collection: School-based questionnaires administered in classrooms.Selected Content: Data are collected on tobacco use, dietary behaviors, physical activity, alcohol and other drug use, sexual behaviors that contribute to unintended pregnancy, STDs, and behaviors that contribute to unintentional injury and violence.Popul
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