COLLIERS INTL GROUP INC revenue for the last year amounted to 100.06 B MXN, the most of which — 60.97 B MXN — came from its highest performing source at the moment, Real Estate Services. The greatest contribution to the revenue figure was made by United States — last year it brought COLLIERS INTL GROUP INC 51.12 B MXN, and the year before that — 40.86 B MXN.