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According to the latest statistics released by the World Bank in 2024, among the OPEC countries in 2011, Saudi Arabia ranked first in terms of gross domestic product(GDP), with a total economic volume of $671.24 billion; Iran ranked second in terms of GDP, with a total economic volume of $626.13 billion; Nigeria ranked third in terms of GDP, with a total economic volume of $404.99 billion; United Arab Emirates ranked fourth in terms of GDP, with a total economy of $350.67 billion; and Venezuela, with a total economy of $316.48 billion, ranked fifth in GDP.