Source: U. S. Census Bureau, American Community Survey, 5-Year Estimates. Updated every year. http://factfinder2.census.gov
Persons living in the same house one year ago are those who responded "Yes, this house" to the question "Did this person live in this house or apartment 1 year ago?" The category includes all people 1 year and over who did not move during the 1 year as well as those who had moved and returned to their residence 1 year before the time of interview.
Residence 1 year ago is used in conjunction with location of current residence to determine the extent of residential mobility of the population and the resulting redistribution of the population across the various states, metropolitan areas, and regions of the country.
Data were tabulated for persons 1 years old and over, and the percentage shown is derived by dividing the number of persons living in the same house by the total number of persons 1 years old and over.
Scope and Methodology:
These data are collected in the American Community Survey (ACS). The data are estimates and are subject to sampling variability. The data for each geographic area are presented together with margins of error at factfinder2.census.gov. The data are period estimates, that is, they represent the characteristics of the population over a specific 60-month data collection period.