The first American Housing Survey (AHS) was conducted in 1973, under the name of the Annual Housing Survey, with a sample size of 60,000 housing units. The survey was conducted on an annual basis from 1973 to 1981. Due to budget constraints, it became biennial, therefore changing its name to the American Housing Survey. The national sample underwent a redesign in 1985 based on data from the 1980 decennial census, with a base sample size of approximately 47,000 housing units. The AHS contains a wide variety of information that can be used by professionals in many fields for planning, decision making, market research, or various kinds of program development. It provides data on apartments, single-family homes, mobile homes, vacant homes, family composition, income, housing and neighborhood quality, housing costs, equipment, fuels, size of housing unit, and recent movers.