Agriculture in Uzbekistan employs 28% of labor force and contributes 24% of GDP (2006 data). Another 8% of GDP is from processing of domestic agricultural output. Cotton, once Uzbekistan's star cash earner, has lost much its luster since independence as wheat began to gain prominence from considerations of food security for the rapidly growing population. Areas cropped to cotton were reduced by more than 25% from 2 million hectares in 1990 to less than 1.5 million hectares in 2006, while wheat cultivation jumped 60% from around 1 million hectares in 1990 to 1.6 million hectares in 2006. Cotton production dropped from 3 million tons annually in the pre-independence decade to around 1.2 million tons since 1995, but even at these reduced levels Uzbekistan produces 3 times as much cotton as all the other Central Asian countries and Azerbaijan combined. Cotton exports tumbled from highs of around 45% of Uzbekistan's total exports in the early 1990s to 17% in 2006. Uzbekistan is the largest producer of jute in West Asia and it also produces significant quantities of silk (Uzbek ikat), fruit, and vegetables, with food products contributing nearly 8% of total exports in 2006. Virtually all agriculture requires irrigation, but because of budgetary constraints there has been practically no expansion of irrigated area since independence: it remains static at 4.2 million hectares, the level reached by 1990 after rapid growth during the Soviet period.