Age at which students would enter a given programme or level of education assuming they start at the official entrance age for the lowest level of education, study full-time throughout and progressed through the education system without repeating or skipping a grade. The official entrance age to a given programme or level is typically, but not always, the most common entrance age.
UNESCO Institute for Statistics
To inform about the demand for educational service by level of education. This is also a key input information needed to produce many education indicators.