Gaza's food prices rose during the blockade, with wheat flour going up 34%, rice up 21%, and baby powder up 30%. In 2007, households spent an average of 62% of their total income on food, compared to 37% in 2004. In less than a decade, the number of families depending on UNRWA food aid increased tenfold. In 2008, 80% of the population relied on humanitarian aid in 2008 compared to 63% in 2006. According to a report by OXFAM in 2009, Gaza suffered from a serious shortage of housing, educational facilities, health facilities and infrastructure, along with an inadequate sewage system that contributed to hygiene and public health problems.