The population of San Pedro Itzicán is currently (in 2019), 9,400 people - of which 3,600 are children and 1,500 are adolescants (15-18 years old). But including the other towns and small local villages, the population is probably around 20,000. The towns and villages include: Mezcala, La Peña, Agua Caliente, La Cuesta, Chalpicote, La Zapotera, San Sebastián, San Juan Tecomatlán and Santa María de la Joya.
However, when you visit the town and villages, you are struck by just how many children are there - so the population has increased dramatically in the past 12 years. 200 babies were born this January 2019 alone!
Based on the 2005 Census, it was reported that the average number of years that the population attended school in San Pedro, was only 4 years. So we assume that some people over 60, who presumably had less schooling, may be illiterate.