Russia actually has even bigger factual ratio, because a lot of GMs in other countries are from exUSSR, which usually means 70% Russia, 20% Ukraine and 5% Kazak

Russia actually has even bigger factual ratio, because a lot of GMs in other countries are from exUSSR, which usually means 70% Russia, 20% Ukraine and 5% Kazakhstan. I just checked three top players in Australia, two of them are clearly exUSSR guys.