A general housing shortage in the mid-1960s was aggravated by the influx of West Bank refugees after the 1967 war, and Jordan still lacked adequate housing in the early 1980s. During 1981–86, some 42,300 new residential building permits were issued. According to 1994 national statistics, there were 831,799 housing units nationwide, including 467,715 apartments, 335,423 dar (traditional, detached structures of one or more rooms), 2,877 barracks, and 6,907 tents. About 80% of all dwelling units were owner occupied. Most residential units were made of cement bricks or concrete blocks. About 3% of all dwellings were described as mud brick and rubble constructions.