Codes and Frequencies
MBPL indicates the U.S. state or territory where the person reported his/her mother was born. For details on the foreign birthplaces refer to variable MBPL.
The codes for MBPLUS are the same as BPLUS, and are compatible with IPUMS birthplace variables.
- United States 1880a: All persons
- United States 1880b: All persons
- United States 1900: All persons
- United States 1910: All persons
- United States: 1880a, 1880b, 1900, 1910