According to the latest statistics released by the World Bank in 2024, among the OPEC countries in 1968, Venezuela ranked first in terms of gross domestic product(GDP), with a total economic volume of $10.03 billion; Iran ranked second in terms of GDP, with a total economic volume of $8.62 billion; Nigeria ranked third in terms of GDP, with a total economic volume of $5.2 billion; Saudi Arabia ranked fourth in terms of GDP, with a total economy of $4.19 billion; and Algeria, with a total economy of $3.85 billion, ranked fifth in GDP.
| Rank | Country | GDP |
|---|---|---|
| 1 | Venezuela | $10.03 billion |
| 2 | Iran | $8.62 billion |
| 3 | Nigeria | $5.2 billion |
| 4 | Saudi Arabia | $4.19 billion |
| 5 | Algeria | $3.85 billion |
| 6 | Iraq | $2.9 billion |
| 7 | Kuwait | $2.66 billion |
| 8 | Gabon | $0.29 billion |
| 9 | Republic of Congo | $0.25 billion |
| 10 | Equatorial Guinea | $0.07 billion |