Notes: OPEC (Organization of Petroleum Exporting Countries) members are Algeria, Angola, Ecuador, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Ara- bia, the United Arab Emirates, and Venezuela. Angola joined OPEC in January 2007. Ecuador was a member of OPEC from 1973-1992, and rejoined OPEC in November 2007. Gabon was a member from 1975-1994. Indonesia withdrew from OPEC in May 2008.
Source: U.S. Department of Energy, Energy Information Administration, Monthly Energy Review (Washington, DC: July 2012), tables 3.3c and 3.3d, available at http://www.eia.doe.gov/emeu/mer/petro.html accessed August 2012.