Geographical Mobility: 2008
http://www.census.gov/Press-Release/www/releases/archives/mobility_of_the_population/013609.html
Reports that fewer people are moving within the U.S. In 2008 35.2 million people changed residences or 11.9% of the population, the lowest rate since the federal government began tracking the figure in 1948. Press release with link to detailed statistical tables. From the Census Bureau.