Sudan is an overwhelmingly agricultural country. Much of the farming occupies some 80% of the workforce but contributes only 35% of the GDP. Industry is largely confined to agricultural processing and light manufacturing; the chief products include ginned cotton, textiles, processed food, beverages, soap, footwear, pharmaceuticals, and armaments. There is also some automobile and light-truck assembly. Petroleum is refined and hydroelectric power is produced. Chief among the annual imports are food, manufactured goods, refinery and transportation equipment, medicines, chemicals, textiles, and wheat; the principal exports are oil and petroleum products, cotton, sesame, livestock, peanuts, gum arabic, and sugar. The leading trade partners are China, Japan, and Saudi Arabia.