In the mid-20th century, high-density housing in inner-city areas, consisting of both private apartments and government-subsidized social housing, was predominantly rental units, with over 100,000 units built annually until the late 1960s. However, the introduction of condominiums in the early 1970s marked a shift in urban housing, with government funding for rentals gradually decreasing due to austerity measures, leading to the cessation of all social housing funding in 1993. paraphrase this