Only the southern part of Mali is suited to farming, and less than 2% of Mali's area is cultivated. Agriculture accounted for about 45% of GDP, 21% of exports, and over 80% of the active labor force in 2001. Millet, rice, and corn are the basic food crops. Millet and sorghum are cultivated mainly in the areas around Ségou, Bandiagara, and Nioro. Paddy rice is cultivated on irrigated farms in the area around Mopti, Ségou, and Niafounké. Cereals are produced for subsistence by 90% of farmers. Peanuts are grown in the Sudanese zone, as are cotton, fruits, vegetables, and henna. The shea tree nut, which grows wild, is exploited by Malians for its oil.