E1 revenue for the last year amounted to 7.83 T KRW, the most of which — 7.43 T KRW — came from its highest performing source at the moment, Gas, the year earlier bringing 7.61 T KRW. The greatest contribution to the revenue figure was made by Overseas — last year it brought E1 4.27 T KRW, and the year before that — 3.94 T KRW.