Education in Bulgaria is overseen by the Ministry of Education and Science. Compulsory education includes one year of mandatory preschool education, before children start primary school at age 6-7. Education is compulsory until age of 16. Education at state-owned schools is free of charge, except for the higher education schools, colleges and universities.
In 1998 enrollment in the primary grades was 93 percent of eligible students, and enrollment in the secondary grades was 81 percent of eligible students. The ratio of females to males in primary schools was 0.97, and the ratio in secondary schools was 0.98. Because of Bulgaria's low birthrate, total primary- and secondary-school enrollment has decreased in the post-communist era, causing reductions in teaching staff and facilities. At the same time, the number of private schools increased by 10 times during the 1990s. Bulgaria's higher education system was fully reorganized in the mid-1990s. Between 1995 and 2002, the number of university graduates increased from 33,000 to 50,000. In 2002 some 42 institutions of higher learning were in operation, and 215,700 students were enrolled. In 2003 some 4.9 percent of Bulgaria's national budget was devoted to education.