According to the latest statistics released by the World Bank in 2024, among the OPEC countries in 1966, Venezuela ranked first in terms of gross domestic product(GDP), with a total economic volume of $8.78 billion; Iran ranked second in terms of GDP, with a total economic volume of $6.79 billion; Nigeria ranked third in terms of GDP, with a total economic volume of $6.37 billion; Algeria ranked fourth in terms of GDP, with a total economy of $3.04 billion; and Kuwait, with a total economy of $2.39 billion, ranked fifth in GDP.
| Rank | Country | GDP |
|---|---|---|
| 1 | Venezuela | $8.78 billion |
| 2 | Iran | $6.79 billion |
| 3 | Nigeria | $6.37 billion |
| 4 | Algeria | $3.04 billion |
| 5 | Kuwait | $2.39 billion |
| 6 | Gabon | $0.25 billion |
| 7 | Republic of Congo | $0.22 billion |
| 8 | Equatorial Guinea | $0.07 billion |