„On average across OECD countries in 2018, 24 % of 15-year-old students attending upper secondary school […] were enrolled in a vocational programme. In Austria, Bosnia and Herzegovina, the Czech Republic and Serbia, over 70 % of 15-year-old students attending upper secondary school were enrolled in a vocational programme.“
OECD (Hrsg.), PISA 2018 Results. Effective Policies, Successful Schools (2020), S. 72.