No religious affiliation has reached 29%.
I've said before, just because you have no religious affiliation does not mean you do not believe in a "god" or the supernatural. It only means you are not associated with any religious organization or denomination.
On the other hand how many persons who are religious fanatics don't belong to organized religion? I think the key here is that people are shying away from organized religion.
So very roughly calculated that's approx 90M faithless against approx 170M faithful. We're closing in.
Well, this is a good trend for the future!