I was sort of wondering if there is any data that compares GDP per capita. Let me explain more... I would make the assumption that if there were a large number of wealthy people making all the money, the the mean GDP per capita would be much higher than the median gdp per capita, but I can't seem to find much data. Here is a basic chart with GDP per capita figures: http://www.worldoffacts.com/worldgdppercapita.php