Thailand's youth literacy rate was 98.1% in 2015. Education is provided by a well-organised school system of kindergartens, primary, lower secondary and upper secondary schools, numerous vocational colleges, and universities. The private sector of education is well developed and significantly contributes to the overall provision of education. Thailand has the second highest number of English-medium private international schools in Southeast Asian Nations. Education is compulsory up to and including age 14, with the government providing free education through to age 17.