Imports totaled an estimated US$4.7 billion in 2005 and are projected to increase to US$5 billion in 2006 and to US$5.4 billion in 2007. Yemen is a net importer of all major categories of products except fuels. Principal imports are machinery and transport equipment, food and livestock, and processed materials. According to the United Nations, Yemen imports more than 75 percent of its main dietary staple—wheat. The principal source of Yemen's imports in 2005 was the United Arab Emirates (13.4 percent of total imports); the bulk of these imports are actually re-exports from the United States and Kuwait. Yemen received 10.6 percent of its total imports from Saudi Arabia and 9 percent from China.