World's Happiest Countries

By Andy Reinhardt - 2012-05-25T15:21:49Z

Photograph by Hans-Peter Merten/Getty Images

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Overall Rank: 10th

Population: 0.5 million

Highest Score: Environment (9.2)

Lowest Score: Education (4.7)

The tiny European Duchy of Luxembourg, usually known for its world-beating per-capita Gross Domestic Product, soars in the OECD study for its good air and water. High scores for income, wealth, and jobs aren't far behind. Luxembourg scores less well in educational attainment.