I don't and I doubt it exists.
If you don't have the data how would you go about comparing the wealth of different countries based on it? I don't see how those claims fit together.
how would you go about comparing the wealth of different countries
I wouldn't. At least until the concept of "wealth of a country" gets defined.
But to answer your question, reread the last paragraph, particularly the part which starts "you can find...".
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.