As of 2001, about 87% of the GDP was contributed by the service sector, primarily those services related to international import/export trade. The main commercial centers are around the Port of Djibouti, the international airport, and the railroad. Domestic trade is dominated by traffic in live sheep and camels, dates, and melons. The government maintains price controls on a number of essential commodities, including wheat flour, bread, sugar, and petroleum products. French citizens dominate the commerce of the city of Djibouti. Business hours normally are 7:30 AM to noon and 3:30 to 6 PM , Sunday through Thursday, and 7:30 AM to noon on Saturday. Banks are open Sunday– Thursday from 7:15 to 11:45 AM .