Source: U. S. Census Bureau, American Community Survey, 5-Year Estimates. Updated every year. http://factfinder2.census.gov
Persons were asked to report whether they sometimes or always spoke a language other than English at home. People who knew languages other than English but did not use them at home, who only used them elsewhere, or whose usage was limited to a few expressions or slang were excluded.
Tabulations of language spoken at home include only the responses of persons 5 years old and over. The percentage shown is obtained by dividing the nnumber of persons speaking a language other than English at home by the total number of persons 5 years 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.