Agriculture is limited chiefly to coconut and pandanus production. About 37,000 ha (91,400 acres) of land is considered arable, representing 5.1% of the total land area. Overseas technical aid has allowed some islands to cultivate bananas and papaws for the Tarawa market. An estimated 12,000 tons of copra, 85,000 tons of coconuts, and 5,000 tons of bananas were produced in 1999. Agricultural trade in 2001 consisted of US $2.5 million in exports and US $11.6 million in imports. Agriculture contributes 30% to GDP.