But it's not uniform. Small example, average birth rate of 1.5 can be a group of 4 people where one had 0, one had 1, one had 2, one had 3. If children model their parents in this respect, it can just as easily swing the other way. Next generation, 0 have 0 children, 1 has 1, 2 have 2, 3 have 3, for an average of 2.33.

Obviously children didn't model their parents the past couple of generations, but times may be changing. I'm curious what the current distribution of birth rate is, not just the mean.