There is another quiz with the same theme, but with more accurate information. Not sure of your source, but it seems to have missed the whole middle east. Also, you spelled countries wrong.
Ah, I've just seen the issue. You do have a source, good, but only included the OECD countries (basically the developed world). I think that's a good idea for a quiz, just change the title and instructions to make it clear.
And what about Monaco, with his population of rich people excaping from taxes in their countries?