Why does religion continue to grow?

[Cephus]

Although it drops as a % of population,

That's the point...

America's (and the world's) population is growing, and most people in Ameriac are Christians.  It makes sense that their kids will be raised Christian as well, so of course the absolute number of Christians is going to increase.  The fact that non-religion continues to grow as a percent is the important part.

I don't see how that's true, considering the most recent Pew survey shows that religiosity in America just fell 7% in 7 years, from 78% to 70%.  The rate of decrease is increasing dramatically as time goes on.  Even if nothing changes though, by 2050, religiosity will have fallen an additional 35% to 35% of the population.  It will bottom out eventually, I'm sure, but the day of Christianity ruling America in any meaningful way is at an end.