As of 2009, which of the following countries had the largest GDP, based on purchasing power parity?
Mexico at $1.42 trillion, although it is a very close group. Canada had the smallest of the group at $1.28 trillion. Spain and South Korea were essentially tied at about $ 1.36 trillion. (PPP involves the use of standard dollar - price weightings for services and products, smoothing out currency effects.
Source: CIA 's World Fact Book