Gabon (pronounce /gəˈbɒn/) is a country in west central Africa sharing borders with Equatorial Guinea, Cameroon, Republic of the Congo and the Gulf of Guinea. The capital and largest city is Libreville. Since its independence from France on August 17, 1960, the Republic has been ruled by only two presidents. In the early 1990s, Gabon introduced a multi party system and a new democratic constitution that allowed for a more transparent electoral process and reformed many governmental institutions. A small population (less than two million), abundant natural resources, and foreign private investment have helped make Gabon one of the most prosperous countries in the region, with the highest HDI in Sub-Saharan Africa.