In 1959 "state-financed universal education" was introduced in all schools; not only instruction and educational facilities, but also textbooks, uniforms, and room and board are provided to students without charge. By 1967 nine years of education became compulsory. In 1975 the compulsory eleven-year education system, which includes one year of preschool education and ten years of primary and secondary education, was implemented; that system remains in effect as of 1993.