It counted the foreign - born aged five or more by the language that they spoke at home since 1980 .
The United States enumerated most or all foreign - born Americans by mother between 1910 and 1970 , with the exception of 1950 .
United States counted the foreign - born aged five or more by the language that they spoke at home since 1980 .
The United States enumerated most or all foreign - born Americans by mother between 1910 and 1970 , with the exception of 1950 .