NOTE: "On school property" was not defined for survey respondents. The term "anywhere" is not used in the YRBS questionnaire; students are simply asked how many days did they have at least one drink of alcohol during the past 30 days. Population sizes from the Digest of Education Statistics, 2005 (NCES 2006-030) for students in grades 9–12 are 13,093,000 students in 1993; 13,697,000 in 1995; 14,272,000 in 1997; 14,623,000 in 1999; 15,061,000 in 2001; 15,723,000 in 2003; and 16,286,000 (projected) in 2005.
SOURCE: Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Youth Risk Behavior Surveillance System (YRBSS), various years, 1993–2005.