The famine had a significant impact on the population growth rate, which declined to 0.9% annually in 2002. It was 0.5% in 2014. Late marriages after military service, limited housing space and long hours of work or political studies further exhaust the population and reduce growth. The national birth rate is 14.5 births per year per 1,000 population. Two-thirds of households consist of extended families mostly living in two-room units. Marriage is virtually universal and divorce is extremely rare.