This is a list of countries by oil production, as compiled from the U.S. Energy Information Administration database for calendar year 2020, tabulating all countries on a comparable best-estimate basis. Compared with shorter-term data, the full-year figures are less prone to distortion from periodic maintenance shutdowns and other seasonal cycles. The volumes in the table represent crude oil and lease condensate, the hydrocarbon liquids collected at or near the wellhead. The volumes in the table do not include biofuel. They also do not include the increase in liquid volumes during oil refining ("refinery gain"), or liquids separated from natural gas in gas processing plants (natural gas liquids).