In OECD countries, compulsory education typically begins with primary education, starting at the age of 6 (see Table X1.5 in Annex 1). However, in about one-third of OECD and partner countries, compulsory education begins earlier, while in Estonia, Finland, Indonesia, Lithuania, the Russian Federation and South Africa, compulsory education does not begin until the age of 7. Compulsory education usually ends with the completion or partial completion of upper secondary education at the age of 16 on average across OECD countries, ranging from 13 (Indonesia) or 14 (Korea) to 18 ( Belgium, Chile, Germany and Portugal). In Slovenia, compulsory education ends at age 14 with the completion of the primary and lower secondary education integrated programme. In the Netherlands, there is partial compulsory education (i.e. students must attend some form of education for at least two days a week) from the age of 16 until they are 18 or until they have completed a diploma. However, high enrolment rates extend beyond the end of compulsory education in a number of countries. On average across OECD countries, full enrolment (the age range when at least 90% of the population is enrolled in education) lasts 14 years, from the age of 4 to the age of 17. The period of full enrolment lasts between 11 and 16 years in most countries and reaches 17 years in Norway. It is shorter in Colombia, Mexico, the Slovak Republic and Turkey, and in partner countries such as Indonesia, Saudi Arabia and South Africa ().