I'm with Strangler here.
Due to cost of living and the fact that we've settled in as first world nations, western countries are producing less babies.
Throughout history, countries that start developing exponentially experience population booms. As soon as China and India get themselves set up I'm sure they'll start having less kids too.
Even the three child family in my parts is becomming somewhat rare. Now if I see a family with a lot of kids, I assume they're catholic.
