OPEC has 13 members and is headquartered in Vienna, Austria. 

Membership includes the ve founding members of Iran, Iraq, 

Kuwait, Saudi Arabia, and Venezuela and the eight acceding 

members of Libya (1962), United Arab Emirates (1967), Algeria 

(1969), Nigeria (1971), Angola (2007), Gabon (joined in 1975, 

terminated in 1995, rejoined in 2016), Equatorial Guinea (2017) 

and the Republic of the Congo (2018). There were three former 

members: Indonesia (joined in 1962, suspended its membership 

in 2008, rejoined in 2015, and suspended again in 2016), Qatar 

(withdrawn in January 2019), and Ecuador (joined in 1973, 

suspended its membership in 1992, reinstated in 2007,and 

withdrawn in January 2020)

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