Decennial SF2 | Summary File 2 (SF 2) contains the data compiled from the questions asked of all people and about every housing unit. Summary File 2 (SF 2) contains the data compiled from the questions asked of all people and about every housing unit. SF 2 includes population characteristics, such as sex, age, average household size, household type, and relationship to householder such as nonrelative or child. The file includes housing characteristics, such as tenure (whether a housing unit is owner-occupied or renter-occupied), age of householder, and household size for occupied housing units. Selected aggregates and medians also are provided | 2010 | dec› sf2 | Aggregate | geographies | variables | groups | sorts | examples | documentation | http://api.census.gov/data/2010/dec/sf2 |