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The purpose of the American Demographic History Chartbook is to present basic information about demographic trends and differentials in the United States in the 1790 to 2000 period, as revealed by the decennial census of population, and to do so using graphics designed for a general audience of persons interested in U.S. history

"World Mapper hosts nearly 700 informative maps and posters. The maps are based on economic, scientific, and demographic data sets. "

"More than 10 million Americans moved from one county to another during 2008. The map below visualizes those moves. Click on any county to see comings and goings: black lines indicate net inward movement, red lines net outward movement."