„Despite this expansion in enrolment in pre-primary education, about 6 % of students in PISA 2018 reported that they had not attended or that they had attended pre-primary education for less than one year, on average across OECD countries.“
OECD (Hrsg.), PISA 2018 Results. Effective Policies, Successful Schools (2020), S. 49.
In Österreich besuchten nur mehr 2,6 % nicht einmal ein Jahr lang vorschulische Einrichtungen. (Quelle: ibidem, Fig. V2.3.)