Official Site - The Legatum Prosperity Index is the world's only global assessment of wealth and wellbeing; unlike other studies that rank countries by actual levels of wealth, life satisfaction or development, the Prosperity Index produces rankings based upon the very foundations of prosperity – those factors that help drive economic growth and produce happy citizens over the long term.
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2009 versus 2011 Comparison

This table shows country rankings over the last three years. It also shows whether countries have risen or fallen in the rankings during this time.