SOUTHERN CO. revenue for the last year amounted to 557.18 B MXN, the most of which — 416.51 B MXN — came from its highest performing source at the moment, Traditional Electric Operating Companies, the year earlier bringing 311.81 B MXN. The greatest contribution to the revenue figure was made by United States — last year it brought SOUTHERN CO. 557.18 B MXN, and the year before that — 428.93 B MXN.