Increasing urbanization has created slum conditions in the major cities. There have been slum clearance and building projects since 1954, but the housing deficit has not yet been met. Around 125,000 new homes were built between 1969 and 1977. Low-income families were allowed to buy ready-made houses from the state at 10% of cost or to build their own homes with interest-free loans. Real estate was the main area of private investment until 1978, when most tenants were made owners of their residences. The state paid full compensation to landlords for confiscated property and resold it to tenants at subsidized prices. As of the late 1980s, the last period for which housing information was available, total housing units numbered 700,000 with 5.6 people per dwelling.