US presidential election voter turnout by age

Total voting-age population, 1964–2012

Notes: Prior to 1972, data are for people 21 to 24 years of age with the exception of those aged 18 to 24 in Georgia and Kentucky, 19 to 24 in Alaska, and 20 to 24 in Hawaii.
Source: U.S. Census Bureau, Current Population Survey, November 2014 and earlier years.
Graphic: Jan Diehm/The Guardian