Source : http://www.economist.com
Related posts:
50 Wealthiest People in The World
The World's Most Expensive Cities [Infographic]
Global freshwater withdrawal in the Year 2000
Top 100 Companies of the Muslim World
The Most Insane Roller Coasters in the World [Infographic]
Waste Management and Recycling [InfoGraphic]
How the World Uses Social Networks [INFOGRAPHIC]
The Blogging World [Infographic]
2011: The Year in Names [Infographic]
25 Archaeoastronomy Sites Around the World