Good question.
Dunno.
Check out this list of GDP per capita from 2008.
https://www.cia.gov/library/publications/the-world-factbook/rankorder/2004rank.html
1 Liechtenstein... $ 118,000 2007 est.
2 Qatar.............. $ 110,700 2008 est.
3 Luxembourg....... $ 81,000 2008 est...