Child population by age group.
Data presented for 2010-2016 are Vintage 2016 estimates. Data presented for 2001 through 2009 are Vintage 2009 population estimates. Each year the U.S. Census Bureau revises their post-2010 estimates. Therefore, data presented here may differ from previously published estimates. Figures for 1980, 1990, and 2000 represent Census counts from April 1 of the stated years.
1980, 1990, 2000-2009: Population Division, U.S. Census Bureau. and 2010-2016: National Center for Health Statistics.
1980: U.S. Census Bureau; Census 1980, Summary Tape File 1, extracted from National Historical Geographic Information System 1990: U.S. Census Bureau; Census 1990, Summary File 1, extracted from National Historical Geographic Information System, 2000: U.S. Census Bureau; Census 2000, Summary File 1, extracted from American Fact Finder, 2001-2009: Population Estimates Program, Population Division, U.S. Census Bureau Washington D.C. Release Date: June 2010, available at http://www.census.gov/popest/estimates.php, 2010-2016: National Center for Health Statistics. Vintage 2016 postcensal estimates of the resident population of the United States, by year, county, single-year of age , bridged race, Hispanic origin, and sex.
Note that data for 2001-2016 represent estimates (not actual counts) of the resident population as of July 1 of the stated year, while data from 1980, 1990, and 2000 represent Census counts for April 1 of the stated year. For more information on how the Census develops estimates, please visit the Population Estimates page at the Census Bureau's web site.