Sweden ranks above the US on the most current list on that page. The other two lists are older data. Also, size and population don't figure in to the comparis

Sweden ranks above the US on the most current list on that page. The other two lists are older data. Also, size and population don't figure in to the comparison. You have to divide by population or the result is that the richest countries are countries like China and India, and the poorest are countries like Monaco and Luxembourg. And that's silly. If you can choose portions of countries, such as a state, it's too hard not to cherry-pick. PPP seems like a good idea. It was devised to reflect that ten dollar buys a giant meal in Kiev but barely a BigMac in Zurich. But once you research it you'll find PPP seems specifically formulated to make Americans feel better about themselves. The basket of goods used to compose PPP is so American-centric that instead of de-skewing the results, it skews them further. The result is a joke. But to be fair, it's easy to agree to disagree on this. Which country is richer is impossible to quantify in a meaningful way because it has to take into account quality of life, and being qualitative, will change per person.