The relationship between the actual number of students at each level and age gruop, and the population of that age group.

The theoretical ages for the different levels of education are:

first cycle Infant Education (0-2 years), second cycle Infant Education (3-5 years), Primary Education (6-11 years), Secondary Education (12-17 years), - E.S.O. (11-15 years), Baccalaureate (16-17 years), intermediate grade Technical Training (16-17 years ), Further Studies (18-29 years)

To calculate schooling rates by age the updated population pyramid prepared by Eustat has been used, except in the last academic year where projection data has been applied.