OCCIDENTAL PETRLM revenue for the last year amounted to 24.27 B CHF, the most of which — 19.71 B CHF — came from its highest performing source at the moment, Oil and Gas, the year earlier bringing 17.92 B CHF. The greatest contribution to the revenue figure was made by United States — last year it brought OCCIDENTAL PETRLM 21.69 B CHF, and the year before that — 20.83 B CHF.