Mexico: number of people lagging behind in education by ethnicity 2014-2018

According to the source, indigenous population includes any person who is part of an indigenous household, where the head of the household, his or her spouse and/or one of the ascendants (mother or father, stepmother or stepfather, grandparents, great-grandparents, great-great-grandparents or parents-in-law) declared that she or he spoke an indigenous language. In addition, it includes people who said they spoke an indigenous language and who were not part of these households.

The source does not provide data for the odd years.