They are all as bad as each other. Corruption is obviously worse in some places than others. Africa is the hot spot Besides from Botswana the rest of the continent is dark red so a hot bed.
Eastern Europe is a mess along side the Far East including India. South America is no surprise as that is a region that has political upheavals on a regular basis.
So from this map no race is exempt from corruption.
Image source transparency.org
You can't really correlate corruption with a race , it's better to analyse with a lens of nation state since all citizens follow the same laws within that country.
No-one is 100% free from corruption so the map posted by Cryptoandcoffee serves as a good relative scale.