Complex sentence: The indigenous population participate in the workforce longer than the national average, starting earlier and continuing longer, however, 55% of the indigenous population receive less than the set Mexican minimum salary, compared to 20% for the national average.
Split into simpler sentences: The indigenous population participate in the workforce longer than the national average, starting earlier and continuing longer. However, 55% of the indigenous population receive less than a minimum salary, compared to 20% for the national average.