In 2012, Qatar retained its title of richest country in the world (according to per capita income) for the third time in a row, having first overtaken Luxembourg in 2010. According to the study published by the Washington-based Institute of International Finance, Qatar's per capita GDP at purchasing power parity (PPP) was $106,000 (QR387,000) in 2012, helping the country retain its ranking as the world's wealthiest nation. Luxembourg came a distant second with nearly $80,000 and Singapore third with per capita income of about $61,000. The research put Qatar's GDP at $182bn in 2012 and said it had climbed to an all-time high due to soaring gas exports and high oil prices. Its population stood at 1.8 million in 2012. The same study published that Qatar Investment Authority (QIA), with assets of $115bn, was ranked 12th among the richest sovereign wealth funds in the world.