For roughly a decade, the U.S. Census Bureau has been publishing the American Community Survey (ACS), which provides timely information on a number of key demographics. The ACS, which replaced the Census Bureau’s long-form decennial census, is published in one-year, three-year and five-year period estimates. This information is used by city planners, demographers, and researchers for a variety of applications such as understanding how a particular community changes over time.

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