According to the Instituto Nacional de Estadística, Geografía e Informática (INEGI), 95.6% of the population over the age of 15 could read and write Spanish, and 97.3% of children of ages 8–14 could read and write Spanish. An estimated 93.5% of the population ages 6–14 attend an institution of education. Estimated 12.8% of residents of the state have obtained a college degree. Average schooling is 8.5 years, which means that in general the average citizen over 15 years of age has gone as far as a second year in secondary education.

What percentage of the population over 15 could read and write Spanish?