Australia and New Zealand consumes the most marijuana in the world

According to a study published in The Lancet, Australia and New Zealand has the highest number of marijuana users in the world.

As much as 15 percent of the population of the two countries between the ages 15 and 64 used marijuana in 2009, the highest rate in the world. By comparison, 11 percent of North Americans and 2.5 percent of people in Asia used marijuana.

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Source: Matt Siegal, “Marijuana Use Most Rampant in Australia, Study Finds,” New York Times, January 6, 2012.