Fertility rate is down in developed nations, and pretty high in undeveloped ones. Most of Africa is in the top spots on the list. https://www.cia.gov/the-world-factbook/field/total-fertility-rate/country-comparison
“ 183 out of 195 countries having a fertility rate below the replacement level.”
https://www.bbc.com/news/health-53409521
Seems like a global issue
> The population of sub-Saharan Africa is expected to treble in size to more than three billion people by 2100. And the study says Nigeria will become the world's second biggest country, with a population of 791 million.
Did you read your own link? There’s your problem right there.
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