Source: U.S. Census Bureau  

Release: Housing Vacancies and Homeownership  

Units:  Thousands of Units, Not Seasonally Adjusted

Frequency:  Quarterly

Beginning in 1990, year-round vacant mobile homes were included as part of the year-round vacant count of housing units. Year-round units are those intended for occupancy at any time of the year, even though they may not be in use the year round. In resort areas, a housing unit which is usually occupied on a year-round basis is considered a year-round unit. As indicated above, year-round units temporarily occupied by persons with usual residence elsewhere are included with year-round vacant units.