*Components may not add to totals because of rounding. Units in thousands.
¹Census of Housing 1970.
²Census of Housing 1980.
³American Housing Survey estimates are available in odd-numbered years only after 1981.
⁴Census of Housing 1990.
⁵Annual Housing Survey estimates through 1981 based on 1970 census weights; 1983 to 1989 estimates based on 1980 census weights; 1991 and 1995 estimates based on 1990 census weights. No reduction in Nation's housing inventory has ever occurred; apparent reductions are due to changes in bases used for weighting sample data.
Sources: Annual Data-Annual or American Housing Surveys; Quarterly Data-Current Population Series/Housing Vacancy Survey in Current Housing Reports: Housing Vacancies and Homeownership, Bureau of the Census, Department of Commerce

Source: Bureau of the Census, Department of Commerce

*Revised based on adjusted 1990 Census weights rather than 1980 Census weights, resulting in lower estimates.
Source: Bureau of the Census, Department of Commerce

¹From 1983 to 1992, data are weighted based on the 1980 decennial census.
²Beginning in 1993, CPS data are weighted based on the 1990 decennial census.
³From 1983 and 1984, the metropolitan data reflect 1970 definitions.
From 1985 to 1994, the metropolitan data reflect 1980 definitions.
Beginning in 1995, the metropolitan data reflect 1990 definitions.
Source: Current Population Survey, Bureau of the Census
Note: The annual data come from two sources: For years 1983 to 1993, the source is the March demographic supplement of the Current Population Survey; and for years 1994 and later, the data are the average of the 12 monthly Current Population Surveys/Housing Vacancy Surveys. For the quarterly data, the source is the corresponding three monthly Current Population Surveys/Housing Vacancy Surveys.