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Source: 1900-1950: U.S. Department of Commerce, Census Bureau, Census of Housing. 1960-present: Census Bureau, Housing Vacancy Survey.
Source: U.S. Department of Commerce, Census Bureau, Census of Housing.
Source: 1900-1950: U.S. Census Bureau, Census of Housing. 1960-present: U.S. Census Bureau, Housing Vacancy Survey.
Source: U.S. Department of Commerce, Census Bureau.