[@BeanieBaggie] Those numbers don't really make sense. It would mean that people would have children no matter what in order to keep the population of survivors up. Meaning that one survivor would be crippled while carrying a baby to term. Then keeping them alive after birth. Just seems strange to me that the age is so low. I have seen many get to 60 and still kick ass. I mean holy crap. This world would provided that kind of environment. 

On another note I was thinking that there are like... raiders? People who became somewhat insane and/or controlled by someone they trusted. Example. Church priest took his flock of would be athletes with him in order to save their souls. He uses the word of god in order to control and frighten them. Fear me because I wield gods divine wrath... kind of thing. Another example would be a sports team coach who already had the perfect athletes and they trust him. I'm just throwing this out there because yeah... would probably happen. They would most likely go around raping, pillaging and killing.