This page has a list of countries by Gross enrolment ratio, primary to tertiary, both sexes (%), according to officially-recognized international sources compiled by the World Bank. Total enrollment in primary, secondary and tertiary education, regardless of age, expressed as a percentage of the total population of primary school age, secondary school age, and the five-year age group following on from secondary school leaving. GER can exceed 100% due to the inclusion of over-aged and under-aged students because of early or late school entrance and grade repetition.