I think its such a low percentage because it probably has low GPA and is probably a developing country. No, I do not think there is Latin American Spanish to the Spanish spoken in the past. I don't think so because they probably have new and more vocabulary words and different ones as well.
Explanation:
Hope this helped if you can please vote me branlieast.
Bueno no haré el ensayo pero me leí la historia solo si me como quieres que te ayude y lo haré con mucho gusto! que detalles quieres saber, si es un ensayo de perspectiva personal o un ensayo relatando la historia?