Source: U.S. Census Bureau, 2010 Census of Population, Public Law 94-171 Redistricting Data File. Updated every 10 years. http://factfinder2.census.gov.
Age classification is based on the age of the person in complete years as of April 1, 2010.
Scope and Methodology:
The data on age were derived from answers to a question that was asked of all people in Census 2010. The age of the person was usually derived from their date of birth information.