¹ Due to short-term data fluctuations associated with small sample sizes for the Black and Hispanic categories, moving average rates are presented. Moving average rates were calculated as the average of the annual estimates for the following three adjacent years: the year in question, the year immediately before it, and the year immediately after it.
NOTE: Includes high school completers ages 16–24, who accounted for about 98 percent of all high school completers in a given year. The Current Population Survey (CPS) questions about educational attainment were reworded in 1992. Before then, high school completers referred to those who had completed 12 years of schooling; beginning in 1992, the term referred to those who had received a high school diploma or equivalency certificate. Race categories exclude persons of Hispanic ethnicity. Detail may not sum to totals because of rounding.
SOURCE: U.S. Department of Commerce, Census Bureau, Current Population Survey (CPS), selected years, October 1980–2008.