Infrastructure Education Education became a proper focus for the colony from the 1870s when public schools began to form and schooling became compulsory. By 2011, 90% of working age residents of Sydney had completed some schooling and 57% had completed the highest level of school. 1,390,703 people were enrolled in an educational institution in 2011 with 45.1% of these attending school and 16.5% studying at a university. Undergraduate or postgraduate qualifications are held by 22.5% of working age Sydney residents and 40.2% of working age residents of the City of Sydney. The most common fields of tertiary qualification are commerce (22.8%), engineering (13.4%), society and culture (10.8%), health (7.8%), and education (6.6%). There are six public universities based in Sydney: The University of Sydney, University of New South Wales, University of Technology Sydney, Macquarie University, Western Sydney University, and Australian Catholic University. Five public universities maintain secondary campuses in the city for both domestic and international students: the University of Notre Dame Australia, Central Queensland University, Victoria University, University of Wollongong, and University of Newcastle. Charles Sturt University and Southern Cross University, both public universities, operate secondary campuses only designated for international students. In addition, four public universities offer programmes in Sydney through third-party education providers: University of the Sunshine Coast, La Trobe University, Federation University Australia and Charles Darwin University. 5.2% of residents of Sydney are attending a university. The University of New South Wales and the University of Sydney are ranked top 50 in the world, the University of Technology Sydney is ranked 133, while Macquarie University is ranked 237, and Western Sydney University is ranked 474. Sydney has public, denominational, and independent schools. 7.8% of Sydney residents are attending primary school and 6.4% are enrolled in secondary school. There are 935 public preschool, primary, and secondary schools in Sydney that are administered by the New South Wales Department of Education. 14 of the 17 selective secondary schools in New South Wales are based in Sydney. Public vocational education and training in Sydney are run by TAFE New South Wales and began with the opening of the Sydney Technical College in 1878. It offered courses in areas such as mechanical drawing, applied mathematics, steam engines, simple surgery, and English grammar. The college became the Sydney Institute in 1992 and now operates alongside its sister TAFE facilities across the Sydney metropolitan area, namely the Northern Sydney Institute, the Western