Oman is a member of the United Nations, the Arab League, the Gulf Cooperation Council, the Non-Aligned Movement and the Organisation of Islamic Cooperation. It has sizeable oil reserves, ranking 25th globally. In 2010, the United Nations Development Programme ranked Oman as the most improved nation in the world in terms of development during the preceding 40 years. A significant portion of its economy involves tourism and trading fish, dates and other agricultural produce. Oman is categorized as a high-income economy and ranks as the 69th most peaceful country in the world according to the Global Peace Index.