'(<a href="http://www.j-archive.com/media/2011-09-28_FJ.wmv">Kelly of the Clue Crew shows a map on the monitor.</a>)  According to the Census, this point has progressed westward since the U.S. was founded & has moved southwest since the 1960s'
the mean center of population
THE CHANGING U.S.A.: According to the Census, this point has progressed westward since the U.S. was founded & has moved southwest since the 1960s
According to the Census, this point has progressed westward since the U.S. was founded & has moved southwest since the 1960s
According to the Census, this point has progressed westward since the U.S. was founded & has moved southwest since the 1960s
THE CHANGING U.S.A.
the mean center of population
THE CHANGING U.S.A.