SOUTHERN CO. revenue for the last year amounted to 428.93 B MXN, the most of which — 311.81 B MXN — came from its highest performing source at the moment, Traditional Electric Operating Companies, the year earlier bringing 398.05 B MXN. The greatest contribution to the revenue figure was made by United States — last year it brought SOUTHERN CO. 428.93 B MXN, and the year before that — 571.07 B MXN.