Source: U.S. Census Bureau, 2000 Census of Population, Profiles of General Demographic Characteristics. Updated every 10 years. http://factfinder.census.gov.
Definition:
Age classification is based on the age of the person in complete years as of April 1, 2000.
Scope and Methodology:
The data on age were derived from answers to a question that was asked of all people in Census 2000. The age of the person was usually derived from their date of birth information.
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