You want to see that number low because it means more people have doubts (or don’t believe in god altogether).
This is what they found — and it’s incredible:
The difference between the youngest and oldest generations has gone from a 6 point gap in 2007 to a 21 point gap now.
Unshakable religious belief is not as strong as it used to be. That’s a good sign. It’s a trend that needs to continue.
If you’d like to see how that question was answered by different demographics, you can do so here.
(Thanks to Daniel for the link!)