SOURCE & METHODOLOGY
Census Population Estimates
Population Estimates Base, April 1, 2000: The Census 2000 reference date population figure used in the components of change model to determine inter-census population estimates. The April 1, 2000 Population Estimates base reflects changes to the Census 2000 population from the Count Question Resolution program and geographic program revisions.
Population Estimate: The calculated number of people living in an area as of July 1. The estimated population is calculated from a component of change model that incorporates information on natural change (births, deaths) and net migration (net domestic migration, net international migration) that has occurred in an area since the latest decennial census.
Numeric Population Change: The difference between the population of an area at the beginning and end of a time period.
Percent Population Change: The difference between the population of an area at the beginning and end of a time period, expressed as a percentage of the beginning population.
Compiled by the Appalachian Regional Commission, March 2011