„There is great variation in the completion of upper-secondary education across OECD countries. While more than 90 % of individuals in Greece, Korea and Slovenia below the age of 25 graduate from upper-secondary education, less than 70 % in Costa Rica, Mexico and the United Kingdom are able to complete their degrees by this age.“
OECD (Hrsg.), Equity and Inclusion in Education – Finding Strength through Diversity (2023), S. 97.