Hope my math checks out. If not I’m sure someone else will correct it:
I was just curious: With a projection of 9.000.000.000 people living in 2035: If 99% of the woman died as you said this would be 45.000.000 living woman. This would result in a population of 4.500.000.000 people in total. So we need to find a reason why half of the total population died 😉