Djiboutian nomads generally live in branch-framed, transportable huts (toukouls), which are covered with woven mats or boiled bark pulled into fine strands and plaited; they are carried from place to place on camels. Good-quality urban housing is in short supply. Construction of 5,000 low-cost dwellings was planned for the 1981–86 period, but only 729 were built. In the past, housing costs have often been subsidized by the government, particular for government or civil employees. This status has begun to change since the late 1990s as the government has imposed housing taxes as part of a greater economic reform package sponsored in part by the International Monetary Fund. In 2000, nearly 100% of the total population had access to imporved water sources; about 99% of urban and 50% of rural dwellers had imporved sanitation systems.