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A map showing the march westward of the mean center of population of the United States from 1790 until the Census of 2010. Picture

A map showing the march westward of the mean center of population of the United States from 1790 until the Census of 2010.

A map showing the march westward of the mean center of population of the United States from 1790 until the Census of 2010.

Photo Date: 2011

Author: NOAA News 050911/ NOAA

License: Public Domain Mark 1.0 (Public domain)
640 x 483 71.51 KB
968 x 730 195.87 KB
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16th October 2015
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