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For the first time since the pollster began asking, Gallup finds that a clear majority of Americans support the legalization of marijuana — a 10 point increase since last November.

That change, visible in the chart at right which goes back to 1996, has been dramatic. 2013 marks the first time more than half of the country endorses legalization. (In 2010, exactly half did so.)

The polling firm credits the shift to independent voters. In 2012, independents were split 50-50 on whether or not marijuana should be legal. Now, 62 percent support it. (The numbers for Democrats and Republicans remained consistent; your stereotypes about how they feel about the drug are correct.) But it's not only independents. It's also young people. Two-thirds of people under 30 support legalization, compared with fewer than half of those over 65.