, The Economy
, Top 5 Richest
, The United States
World Development Indicators database, World Bank, 1 July 2013
A complete listing of Gross Domestic Product (GDP) by country can be found in this PDF
The GDP dollar amounts are estimates based on purchasing power parity (PPP) in current international $.
Image By Agnico-Eagle (Agnico-Eagle Mines Limited) [CC0
], via Wikimedia Commons