<Table> <Tr> <Th> Country </Th> <Th> Region </Th> <Th> Membership Years </Th> <Th> Population ( 2016 est . ) </Th> <Th> Area ( km ) </Th> <Th> Oil Production ( bbl / day , 2016 ) </Th> <Th> Proven Reserves ( bbl , 2016 ) </Th> </Tr> <Tr> <Td> Algeria </Td> <Td> North Africa </Td> <Td> 1969 -- </Td> <Td> 40,606,052 </Td> <Td> 2,381,740 </Td> <Td> 1,348,361 </Td> <Td> 12,200,000,000 </Td> </Tr> <Tr> <Td> Angola </Td> <Td> Southern Africa </Td> <Td> 2007 -- </Td> <Td> 28,813,463 </Td> <Td> 1,246,700 </Td> <Td> 1,769,615 </Td> <Td> 8,423,000,000 </Td> </Tr> <Tr> <Td> Ecuador </Td> <Td> Americas </Td> <Td> 1973 -- 1992 , 2007 -- </Td> <Td> 16,385,068 </Td> <Td> 283,560 </Td> <Td> 548,421 </Td> <Td> 8,273,000,000 </Td> </Tr> <Tr> <Td> Equatorial Guinea </Td> <Td> Western Africa </Td> <Td> 2017 -- </Td> <Td> 1,221,490 </Td> <Td> 28,051 </Td> <Td> 227,000 </Td> <Td> 1,100,000,000 </Td> </Tr> <Tr> <Td> Gabon </Td> <Td> Western Africa </Td> <Td> 1975 -- 1995 , 2016 -- </Td> <Td> 1,979,786 </Td> <Td> 267,667 </Td> <Td> 210,820 </Td> <Td> 2,000,000,000 </Td> </Tr> <Tr> <Td> Iran </Td> <Td> Middle East </Td> <Td> 1960 -- </Td> <Td> 80,277,428 </Td> <Td> 1,648,000 </Td> <Td> 3,990,956 </Td> <Td> 157,530,000,000 </Td> </Tr> <Tr> <Td> Iraq </Td> <Td> Middle East </Td> <Td> 1960 -- </Td> <Td> 37,202,572 </Td> <Td> 437,072 </Td> <Td> 4,451,516 </Td> <Td> 143,069,000,000 </Td> </Tr> <Tr> <Td> Kuwait </Td> <Td> Middle East </Td> <Td> 1960 -- </Td> <Td> 4,052,584 </Td> <Td> 17,820 </Td> <Td> 2,923,825 </Td> <Td> 101,500,000,000 </Td> </Tr> <Tr> <Td> Libya </Td> <Td> North Africa </Td> <Td> 1962 -- </Td> <Td> 6,293,253 </Td> <Td> 1,759,540 </Td> <Td> 384,686 </Td> <Td> 48,363,000,000 </Td> </Tr> <Tr> <Td> Nigeria </Td> <Td> Western Africa </Td> <Td> 1971 -- </Td> <Td> 185,989,640 </Td> <Td> 923,768 </Td> <Td> 1,999,885 </Td> <Td> 37,070,000,000 </Td> </Tr> <Tr> <Td> Qatar </Td> <Td> Middle East </Td> <Td> 1961 -- </Td> <Td> 2,569,804 </Td> <Td> 11,437 </Td> <Td> 1,522,902 </Td> <Td> 25,244,000,000 </Td> </Tr> <Tr> <Td> Saudi Arabia </Td> <Td> Middle East </Td> <Td> 1960 -- </Td> <Td> 32,275,687 </Td> <Td> 2,149,690 </Td> <Td> 10,460,710 </Td> <Td> 266,578,000,000 </Td> </Tr> <Tr> <Td> United Arab Emirates </Td> <Td> Middle East </Td> <Td> 1967 -- </Td> <Td> 9,269,612 </Td> <Td> 83,600 </Td> <Td> 3,106,077 </Td> <Td> 97,800,000,000 </Td> </Tr> <Tr> <Td> Venezuela </Td> <Td> Americas </Td> <Td> 1960 -- </Td> <Td> 31,568,179 </Td> <Td> 912,050 </Td> <Td> 2,276,967 </Td> <Td> 299,953,000,000 </Td> </Tr> <Tr> <Th colspan="3"> OPEC Total </Th> <Th> 478,498,000 </Th> <Th> 12,150,695 </Th> <Th> 35,221,740 </Th> <Th> 1,209,103,000,000 </Th> </Tr> <Tr> <Th colspan="3"> World Total </Th> <Th> 7,588,065,000 </Th> <Th> 510,072,000 </Th> <Th> 80,622,287 </Th> <Th> 1,650,585,000,000 </Th> </Tr> <Tr> <Th colspan="3"> OPEC Percent </Th> <Th> 6 % </Th> <Th> 2 % </Th> <Th> 44 % </Th> <Th> 73 % </Th> </Tr> </Table>
<Table> <Tr> <Th> Country </Th> <Th> Region </Th> <Th> Membership Years </Th> <Th> Population ( 2016 est . ) </Th> <Th> Area ( km ) </Th> <Th> Oil Production ( bbl / day , 2016 ) </Th> <Th> Proven Reserves ( bbl , 2016 ) </Th> </Tr> <Tr> <Td> Algeria </Td> <Td> North Africa </Td> <Td> 1969 -- </Td> <Td> 40,606,052 </Td> <Td> 2,381,740 </Td> <Td> 1,348,361 </Td> <Td> 12,200,000,000 </Td> </Tr> <Tr> <Td> Angola </Td> <Td> Southern Africa </Td> <Td> 2007 -- </Td> <Td> 28,813,463 </Td> <Td> 1,246,700 </Td> <Td> 1,769,615 </Td> <Td> 8,423,000,000 </Td> </Tr> <Tr> <Td> Ecuador </Td> <Td> Americas </Td> <Td> 1973 -- 1992 , 2007 -- </Td> <Td> 16,385,068 </Td> <Td> 283,560 </Td> <Td> 548,421 </Td> <Td> 8,273,000,000 </Td> </Tr> <Tr> <Td> Equatorial Guinea </Td> <Td> Western Africa </Td> <Td> 2017 -- </Td> <Td> 1,221,490 </Td> <Td> 28,051 </Td> <Td> 227,000 </Td> <Td> 1,100,000,000 </Td> </Tr> <Tr> <Td> Gabon </Td> <Td> Western Africa </Td> <Td> 1975 -- 1995 , 2016 -- </Td> <Td> 1,979,786 </Td> <Td> 267,667 </Td> <Td> 210,820 </Td> <Td> 2,000,000,000 </Td> </Tr> <Tr> <Td> Iran </Td> <Td> Middle East </Td> <Td> 1960 -- </Td> <Td> 80,277,428 </Td> <Td> 1,648,000 </Td> <Td> 3,990,956 </Td> <Td> 157,530,000,000 </Td> </Tr> <Tr> <Td> Iraq </Td> <Td> Middle East </Td> <Td> 1960 -- </Td> <Td> 37,202,572 </Td> <Td> 437,072 </Td> <Td> 4,451,516 </Td> <Td> 143,069,000,000 </Td> </Tr> <Tr> <Td> Kuwait </Td> <Td> Middle East </Td> <Td> 1960 -- </Td> <Td> 4,052,584 </Td> <Td> 17,820 </Td> <Td> 2,923,825 </Td> <Td> 101,500,000,000 </Td> </Tr> <Tr> <Td> Libya </Td> <Td> North Africa </Td> <Td> 1962 -- </Td> <Td> 6,293,253 </Td> <Td> 1,759,540 </Td> <Td> 384,686 </Td> <Td> 48,363,000,000 </Td> </Tr> <Tr> <Td> Nigeria </Td> <Td> Western Africa </Td> <Td> 1971 -- </Td> <Td> 185,989,640 </Td> <Td> 923,768 </Td> <Td> 1,999,885 </Td> <Td> 37,070,000,000 </Td> </Tr> <Tr> <Td> Qatar </Td> <Td> Middle East </Td> <Td> 1961 -- </Td> <Td> 2,569,804 </Td> <Td> 11,437 </Td> <Td> 1,522,902 </Td> <Td> 25,244,000,000 </Td> </Tr> <Tr> <Td> Saudi Arabia </Td> <Td> Middle East </Td> <Td> 1960 -- </Td> <Td> 32,275,687 </Td> <Td> 2,149,690 </Td> <Td> 10,460,710 </Td> <Td> 266,578,000,000 </Td> </Tr> <Tr> <Td> United Arab Emirates </Td> <Td> Middle East </Td> <Td> 1967 -- </Td> <Td> 9,269,612 </Td> <Td> 83,600 </Td> <Td> 3,106,077 </Td> <Td> 97,800,000,000 </Td> </Tr> <Tr> <Td> Venezuela </Td> <Td> Americas </Td> <Td> 1960 -- </Td> <Td> 31,568,179 </Td> <Td> 912,050 </Td> <Td> 2,276,967 </Td> <Td> 299,953,000,000 </Td> </Tr> <Tr> <Th colspan="3"> OPEC Total </Th> <Th> 478,498,000 </Th> <Th> 12,150,695 </Th> <Th> 35,221,740 </Th> <Th> 1,209,103,000,000 </Th> </Tr> <Tr> <Th colspan="3"> World Total </Th> <Th> 7,588,065,000 </Th> <Th> 510,072,000 </Th> <Th> 80,622,287 </Th> <Th> 1,650,585,000,000 </Th> </Tr> <Tr> <Th colspan="3"> OPEC Percent </Th> <Th> 6 % </Th> <Th> 2 % </Th> <Th> 44 % </Th> <Th> 73 % </Th> </Tr> </Table>
when did nigeria become a member of opec
when did nigeria become a member of opec
1971
1971