Still Moving, But Why?

"Between 2013 and 2014, 35.7 million people age 1 and over moved to a different residence in the United States. This represents about one-ninth of the population — about the population of Texas and New Jersey combined (35.9 million). The mover rate, measured as the percentage of the population that moved over a one-year period, was 11.5 percent for 2014.The migration statistics released today tell us how many people are moving, the type of move, characteristics of movers and why they moved. According to the estimates, about two-thirds of all moves were within the same county last year, while just under one-third were to different counties and about three percent were from abroad..."
Geographic mobility

About 36 Million Americans Moved in the Last Year,

"The U.S. Census Bureau reports that 35.9 million U.S. residents, or 11.7 percent of all Americans, moved between 2012 and 2013.

The nation's mover rate is down from 12.0 percent in 2012. The decline in the nation's overall mover rate follows an uptick from the record low of 11.6 percent in 2011. That leaves the 2013 mover rate not statistically different from the 2011 rate. The number of people who moved in the past year was not statistically different from the corresponding 2012 number (36.5 million).

This information comes from Geographical Mobility: 2012 to 2013 [PDF], a collection of national- and regional-level tables from the Annual Social and Economic Supplement of the Current Population Survey..." Geographic mobility

Geographic Mobility: 2011

"The percentage of people who changed residences between 2010 and 2011 ─ 11.6 percent ─ was the lowest recorded rate since the Current Population Survey began collecting statistics on the movement of people in the United States in 1948, the U.S. Census Bureau reported today. The rate, which was 20.2 percent in 1985, declined to a then-record low of 11.9 percent in 2008 before rising to 12.5 percent in 2009. The 2010 rate was not statistically different than the 2009 rate.

This information comes from Geographical Mobility: 2011, a collection of national- and regional-level tables from the Current Population Survey Annual Social and Economic Supplement. The tables shed light on movement of people within the United States from one location to another during the year prior to the survey.."