25-34 year-olds who had not completed upper-secondary education …

„In 2005, as many as 21 % of 25-34 year-olds had not completed upper-secondary education; by 2015 this percentage had dropped to 16 %.“
OECD (Hrsg.), OECD Skills Outlook 2021 (2021), S. 100.
In Österreich waren es im Jahr 2005 13 % und im Jahr 2015 10 %. (Quelle: Eurostat-Datenbank, Abfrage vom 12. März 2024.)