Tanzania suffers from a terrible shortage of good quality and affordable housing. So dire is this shortage that the nation currently carries a 3 million housing deficit coupled with a 200,000 unit annual demand. Over seventy percent of its urban residents live in unplanned and unserviced informal settlements. Only 15 percent of household in Tanzania have electricity, with a very large disparity between urban and rural households in Mainland Tanzania (45 percent and 3 percent respectively). Two in three households in Tanzania (67 percent) live in dwelling with earth, sand or dung flooring. Cement flooring only accounts for 30 percent of households.