This annual report from the Centers for Disease Control "monitors six categories of priority health-risk behaviors among youth and young adults -- behaviors that contribute to unintentional and intentional injuries; tobacco use; alcohol and other drug use; sexual behaviors that contribute to unintended pregnancy and sexually transmitted diseases (STDs) (including human immunodeficiency virus [HIV] infection); unhealthy dietary behaviors; and physical inactivity." Statistical tables in this report provide extensive data on the four leading causes of death for persons aged 10-24, accounting for 75 percent of all mortalities for this group: motor-vehicle accidents, other intentional injuries, homicide, and suicide.