OECD Ti ṣe iṣowo iṣowo kan, ni awọn agbegbe 4 ti o yatọ, ti Gdp giga nipasẹ owo-ori, pẹlu ilana iṣowo aje Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named membership "Member Countries' Budget Contributions for 2017". OECD. Retrieved 5 July 2018.