Agricultural production in WA is a major contributor to the state and national economy. Although tending to be highly seasonal, 2006-07 wheat production in WA was nearly 10 million tonnes, accounting for almost half the nation's total. and providing $1.7 billion in export income. Other significant farm output includes barley, peas, wool, lamb and beef. There is a high level of overseas demand for imports of live animals from WA, driven mainly by South East Asia's feedlots and Middle Eastern countries, where cultural and religious traditions and a lack of storage and refrigeration facilities favour live animals over imports of processed meat. Approximately 50% of Australia's live cattle exports come from Western Australia.