Within the next 20 years: 26%
20-40 years from now: 45%
+ 40 years from now: 23%
Yes, the blogger poll does round up since the results add up to 101%.
Regarding the 2% voters it's easy to become discouraged with the state of America regarding faith. Everyday the populace is bombarded with religious propaganda ranging from the outright evil (Bill Donahue stating that the Catholic pedophile scandal isn't that bad) to the absurdity of the wedding royale. It's my assertion that as long as this country does not slip into despotism of one kind or another atheism will win in the marketplace of ideas as it has in many European countries.
Perhaps I am overly optimistic (this is Purgatory and not Hell, after all), but many Americans today have seen: the death of segregation, the fall of the Soviet Union, and, of course, a black man in the presidency. If you told the average person on the street in Mississippi circa 1959 that Jim Crow would be abolished soon they would probably laugh at you. If I was informed in 1986 that the Berlin Wall would fall in 1989 I wouldn't believe it. Dave Chappelle did an incredibly funny bit about the first (ie, never gonna happen) black president not that long before the Age of Obama. I am hopeful that America will have an openly atheist president in the next 20-40 years. I would be happy if it occurred before that, and if not, expect (yes expect) that my children will live during a presidency of the rational.
The new poll is Worst Idea In Christianity. Unsurprisingly, there are many options to choose from.