Novi Sad. Other touristic products that Serbia offer are natural wonders like Đavolja varoš, Christian pilgrimage to the many Orthodox monasteries across the country and the river cruising along the Danube. There are several internationally popular music festivals held in Serbia, such as EXIT (with 25–30,000 foreign visitors coming from 60 countries) and the Guča trumpet festival. Education and science According to 2011 census, literacy in Serbia stands at 98% of population while computer literacy is at 49% (complete computer literacy is at 34.2%). Same census showed the following levels of education: 16.2% of inhabitants have higher education (10.6% have bachelors or master's degrees, 5.6% have an associate degree), 49% have a secondary education, 20.7% have an elementary education, and 13.7% have not completed elementary education. Education in Serbia is regulated by the Ministry of Education and Science. Education starts in either preschools or elementary schools. Children enroll in elementary schools at the age of seven. Compulsory education consists of eight grades of elementary school. Students have the opportunity to attend gymnasiums and vocational schools for another four years, or to enroll in vocational training for 2 to 3 years. Following the completion of gymnasiums or vocational schools, students have the opportunity to attend university. Elementary and secondary education are also available in languages of recognised minorities in Serbia, where classes are held in Hungarian, Slovak, Albanian, Romanian, Rusyn, Bulgarian as well as Bosnian and Croatian languages. Petnica Science Center is a notable institution for extracurricular science education focusing on gifted students. There are 19 universities in Serbia (nine public universities with a total number of 86 faculties and ten private universities with 51 faculties). In 2018/2019 academic year, 210,480 students attended 19 universities (181,310 at public universities and some 29,170 at private universities) while 47,169 attended 81 "higher schools". Public universities in Serbia are: the University of Belgrade (oldest, founded in 1808, and largest university with 97,696 undergraduates and graduates), University of Novi Sad (founded in 1960 and with student body of 42,489), University of Niš (founded in 1965; 20,559 students), University of Kragujevac (founded in 1976; 14,053 students), University of Priština (located in North Mitrovica), Public University of Novi Pazar as well as three specialist universities – University of Arts, University of Defence and University of Criminal Investigation and Police Studies. Largest private universities include Megatrend University and Singidunum University, both in Belgrade, and Educons University in Novi