Sorry, Buzz, that doesn't help answer my question. Not your fault, it just assumes that I know things that I don't. On average, how many players are/could be on both their country's Olympic team and Copa America team (or the relevant tournament for their region)? I honestly have no idea what percentage of players at that level are under 23-years-old.
Again, not your fault that your answer didn't help (I promise - not a dig at you).