On average over all OECD countries, the foreign-born population accounted for 13 % of the population in 2018 …

„On average over all OECD countries, the foreign-born population accounted for 13 % of the population in 2018, up from 9.5 % in 2000.“
OECD (Hrsg.), International Migration Outlook 2019 (2019), S. 41.
Österreich: 19,4 % (2000: 10,5 %; Quelle: ibidem, Figure 1.10.)