History: United States Of America, 1940

Public debt - $13.87 trillion (December 30, 2010)
Household net worth - $54.2 trillion (4Q 2009)
The United States has a capitalist mixed economy, which is fueled by abundant natural resources, a well-developed infrastructure, and high productivity. According to the International Monetary Fund, the U.S. GDP of $14.870 trillion constitutes 24% of the gross world product at market exchange rates and almost 21% of the gross world product at purchasing power parity (PPP). It has the largest national GDP in the world, though it is about 5% less than the GDP of the European Union at PPP in 2008. The country ranks ninth in the world in nominal GDP per capita and sixth in GDP per capita at PPP.