GRAN TIERRA ENERGY INC. revenue for the last year amounted to 844.21 M CAD, the most of which — 844.21 M CAD — came from its highest performing source at the moment, Oil and Natural Gas, the year earlier bringing 964.33 M CAD. The greatest contribution to the revenue figure was made by Colombia — last year it brought GRAN TIERRA ENERGY INC. 844.21 M CAD, and the year before that — 964.33 M CAD.