Brunei maintains diplomatic relations with 170 out of 193 countries, joined ASEAN on 7 January 1984, one week after resuming full independence, and gives its ASEAN membership the highest priority in its foreign relations. Brunei joined the United Nations in September 1984. It is also a member of the Organisation of Islamic Cooperation (OIC), the Asia-Pacific Economic Cooperation (APEC) forum and the Commonwealth of Nations. Brunei hosted the APEC Economic Leaders' Meeting in November 2000. In 2005 it attended the inaugural East Asia Summit.