Before revision: Symbol radius reflect population size in each country A population that maintained a TFR of 3.8 over an extended period without a correspondingly high death or emigration rate would increase rapidly ( doubling period ~ 32 years ), whereas a .
After revision: Symbol radius reflect population size in each country A population that maintained a TFR of 3.8 over an extended period without a correspondingly high death or emigration rate would increase rapidly , doubling period ~ 32 years ,, .