40% of US Americans believe the Earth is less than 10,000 years old

"But evolution is only a theory!", which is true, it is a theory, it’s good that they say that, I think, it gives you hope, doesn’t it, that - that maybe they feel the same way about the theory of gravity... and they might just float the fuck away. -Tim Minchin

If this is true, I'd love to see a geographical breakdown of where these people live...somehow I'm skeptical that 40% of folks in i.e CA & NY believe this..