Bermuda is a British Overseas Territory in the North Atlantic Ocean. It is approximately 1,035.26 km (643 mi) east-southeast of Cape Hatteras, North Carolina ; 1,236 km (768 mi) south of Cape Sable Island, Nova Scotia; 1,759 km (1,093 mi) northeast of Cuba, and 1,538 km (956 mi) due north of the British Virgin Islands. Though it is typically referred to in the singular, Bermuda consists of 181 islands; the largest of these islands is known as Main Island. The capital city of Bermuda is Hamilton. Bermuda is internally self-governing, with its own constitution and cabinet of ministers selected from the elected Members of the lower house of a Parliament that enacts local laws. As the national government, the Government of the United Kingdom is ultimately responsible for ensuring good governance within British Overseas Territories, and retains responsibility for defence and foreign relations. As of July 2018, it has a population of 71,176, making it the most populous of the British overseas territories. Bermuda's largest economic sectors are offshore insurance, reinsurance, and tourism. Bermuda had one of the world's highest GDP per capita for most of the 20th century.