The marketing of the groundnut crop for export is handled by the Gambia Produce Marketing Board. About 75% of the population is employed in subsistence farming. Manufacturing is primarily based on agriculture and serves a domestic market. Cooperative banking and marketing unions finance the activities of a network of cooperatives in the groundnut-growing areas. Reexportation of goods through the port of Banjul is a major contributing factor to the economy. Normal business hours are from 8 AM to noon and 2 to 5 PM , Monday through Thursday, 8 AM to noon and 3 to 5 PM on Friday, and 8 or 9 AM to noon on Saturday.