GDP ranking of OPEC countries in 1975

According to the latest statistics released by the World Bank in 2024, among the OPEC countries in 1975, Iran ranked first in terms of gross domestic product(GDP), with a total economic volume of $51.78 billion; Saudi Arabia ranked second in terms of GDP, with a total economic volume of $46.77 billion; Nigeria ranked third in terms of GDP, with a total economic volume of $27.78 billion; Venezuela ranked fourth in terms of GDP, with a total economy of $27.47 billion; and Algeria, with a total economy of $15.56 billion, ranked fifth in GDP.