The Republic of the Congo is a member of the African Union, the United Nations, La Francophonie, the Economic Community of Central African States, and the Non-Aligned Movement. It has become the fourth-largest oil producer in the Gulf of Guinea, providing the country with a degree of prosperity despite political and economic instability in some areas and unequal distribution of oil revenue nationwide. Congo's economy is heavily dependent on the oil sector, and economic growth has slowed considerably since the post-2015 drop in oil prices. With a population of 5.2 million, 88.5% of the country practices Christianity.