Before revision: +Population momentum exampleTimeGen 1Gen 2Gen 3Gen 4Gen 5Notes0100 (old)200 (fertile)400 (children) Population: 700Fertility Rate: 41dead200 (old)400 (fertile)400 (children) Population: 1000Fertility Rate: 22deaddead400 (old)400 (fertile)400 (children) Population: 1200Fertility Rate: 2 First note that the second and third generation of the initial population are each twice the size of the previous.
After revision: +Population momentum exampleTimeGen 1Gen 2Gen 3Gen 4Gen 5Total populationFertility rate ofcurrent fertilecohort0100 (old)200 (fertile)400 (children) 70041dead200 (old)400 (fertile)400 (children) 100022deaddead400 (old)400 (fertile)400 (children) 12002 First note that the second and third generation of the initial population are each twice the size of the previous.