I mean, 20% is the difference between the current US fertility rate (1.64) and a rate above 2. Obviously the 20% of the population more than 2 hours from their

I mean, 20% is the difference between the current US fertility rate (1.64) and a rate above 2. Obviously the 20% of the population more than 2 hours from their parents isn't abstaining from children absolutely, but it's the right order of magnitude to be a significant factor.