An estimated 99 percent of Thailand’s population is literate. The country has a comprehensive educational system that extends from kindergarten to university and adult education. Education is free and compulsory for 6 years beginning at age 7, and 88 percent of primary-school aged children are enrolled. About 57 percent of students continue to secondary education, which normally finishes at age 17. The country has a wide range of private schools, from international schools to palace and experimental schools. Thailand has a growing university sector, and 20.9 percent of Thais of university age are enrolled. Universities include the prestigious Chulalongkorn University, Mahidol University (a medical school), Kasetsart University (for agriculture, forestry, and fisheries), Thammasat University (for the social sciences), Silpakorn University (for fine arts), and the Asian Institute of Technology, all located in Bangkok, and Chiang Mai University, in the north. The country also has a number of teacher-training colleges. Many Thai students choose to study abroad, especially in North America, Europe, Australia, and Japan.