According to the latest statistics released by the World Bank in 2024, among the OPEC countries in 1971, Iran ranked first in terms of gross domestic product(GDP), with a total economic volume of $13.73 billion; Venezuela ranked second in terms of GDP, with a total economic volume of $12.99 billion; Nigeria ranked third in terms of GDP, with a total economic volume of $9.18 billion; Saudi Arabia ranked fourth in terms of GDP, with a total economy of $7.19 billion; and Algeria, with a total economy of $5.08 billion, ranked fifth in GDP.
| Rank | Country | GDP |
|---|---|---|
| 1 | Iran | $13.73 billion |
| 2 | Venezuela | $12.99 billion |
| 3 | Nigeria | $9.18 billion |
| 4 | Saudi Arabia | $7.19 billion |
| 5 | Algeria | $5.08 billion |
| 6 | Kuwait | $3.88 billion |
| 7 | Iraq | $3.87 billion |
| 8 | Gabon | $0.38 billion |
| 9 | Republic of Congo | $0.32 billion |
| 10 | Equatorial Guinea | $0.07 billion |