According to 1998 census, the total number of housing units throughout the country was 19.3 million. 67.7% housing was in rural areas and 32.3% in urban areas. The overall housing stock comprised of 39% kucha houses, 40% semi pukka houses and 21% pukka houses. The housing backlog, as estimated according to the 1998 census, was 4.3 million units. The additional annual requirement is estimated around 300,000 units, thereby, resulting in a recurring shortfall of 270,000 housing units annually.