Bahrain developed the first post-oil economy in the Persian Gulf, the result of decades of investing in the banking and tourism sectors; many of the world's largest financial institutions have a presence in the country's capital. It consequently has a high Human Development Index and is recognised by the World Bank as a high-income economy. Bahrain is a member of the United Nations, Non-Aligned Movement, Arab League, Organisation of Islamic Cooperation and the Gulf Cooperation Council.