Hello, I'm an expert in global economics and financial markets. When discussing the "richest" country, it's important to clarify the criteria we're using to measure wealth. Typically, this can be assessed by looking at Gross Domestic Product (GDP), GDP per capita, or the total wealth of a nation.

As of my last update, when considering GDP per capita, which is a common measure of the average economic output per person, countries like Luxembourg, Switzerland, and Norway often rank at the top. However, when looking at the total GDP, which is the total economic output of a country, the United States has consistently been the largest economy in the world.

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#1 Qatar. GDP (PPP) per capita: $88,222 (estimated from 2009) ... #2 Luxembourg. GDP (PPP) per capita: $81,466. ... #3 Singapore. GDP (PPP) per capita: $56,694 (estimated from 2009) ... #4 Norway. GDP (PPP) per capita: $51,959 (estimated from 2009) ... #5 Brunei. GDP (PPP) per capita: $48,333. ... #6 United Arab Emirates.read more >>