The Economist has surprised everybody by doing something fun, using the United Nations' World Drug Report 2012 (released yesterday) to generate a map of the world's heaviest weed users. The Pacific island of Palau wins easily, with nearly a quarter of people aged 15 to 64 having smoked pot in the past year. South Africa does okay, too.
Presumably they chose the colour scheme based on how red the eyes of surveyed citizens ...