Popa, you are brilliant, but I was doing other calculations at the time.
Nice cheshbon, except that childbearing years are pretty constant, there isn’t that much variation, and that’s why I put the word “typical” into my question.
Similar to your cheshbon, if left over girls are based on average age gap, can we fix the entire shidduch calamity by having one newborn baby boy marry a one hundred year old lady?
95, Mr, Rechnitz actually quoted a shadchan who said 15% was generous.