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8. Mexico

Crude production: 2.95 million barrels per day
Share of world production: 3.3 percent
Daily exports to the U.S.: 1.11 million barrels
Proven reserves: 10.42 billion barrels

Pictured: Two workers walk aboard the Pemex (Petróleos Mexicanos) Ku-S oil processing center, part of the Ku-Maloob-Zaap complex, in the Gulf of Mexico off Ciudad del Carmen, Campeche state, Mexico.

Photo: Alfredo Estrella | AFP | Getty Images