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Note: Because of the relatively large differences in the organization of the non-integrated refiners and the rest of the U.S. majors, two measures are given for the two years that the non-integrated refiners have been considered U.S. majors by EIA; one without the non-integrated refiners (grey) and one with the non-integrated refiners (black).
Source: Energy Information Administration, Form EIA-28 (Financial Reporting System).