Data for these figures are presented in the following tables, NSDUH, MTF, and YRBS respectively.
[Shaded area marks the implementation of a major redesign to the NSDUH survey in 1999 and methodological changes in 2002.]

Source: Chen, C.M.; Yi, H.; Williams, G.D.; and Faden, V.B. Surveillance Report #86. Trends in Underage Drinking in the United States, 1991–2007. Bethesda, MD: NIAAA, Division of Epidemiology and Prevention Research, Alcohol Epidemiologic Data System, January 2009, e-pub @ http://pubs.niaaa.nih.gov/publications/surveillance86/Underage07.htm.