Methodology for the United States Population Estimates: Vintage 2014. Nations, States, Counties, and Puerto Rico, April 1, 2010 to July 1, 2014.

摘要

Populations can change in three ways: people may be born (births), they may die (deaths), or they may move (domestic and international migration). The U.S. Census Bureau’s Population Estimates program measures this change and adds it to the last decennial census to produce updated population estimates every year.