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World's top 20 oil producers revealed

MEXICO CITY, MEXICO - JUNE 26: The Palacio de Bellas Artes arts and cultural center is seen from the Latino Tower on June 26, 2012 in Mexico City, Mexico. Mexicans go to the polls to elect a new president this Sunday, July 1. (Photo by John Moore/Getty Images)

World's 20 biggest oil producers

With crude production of crude oil on track for the biggest single-year gain in 60 years, the U.S. could be set to push past Saudi Arabia as the globe's top oil producer. Here we count down the world's top 20.