GDP per capita is predicted to reach $50000 by 2006 which includes the whole population of Qatar, this is according to a cabinet member. The country should be the richest per capita from next year.
As for the most recent GDP figures (From Qatar Central Bank and Planning Council / Figures rounded):
2002/2003 Gross Domestic Product: US $18.8 billion
Population Estimates: 621,000
Doing the Math: $30,300