<Table> <Tr> <Td> above 0.950 0.900--0.949 0.850--0.899 0.800--0.849 0.750--0.799 </Td> <Td> 0.700--0.749 0.650--0.699 0.600--0.649 0.550--0.599 0.500--0.549 </Td> <Td> 0.450--0.499 0.400--0.449 0.350--0.399 0.300--0.349 under 0.300 n / a </Td> </Tr> </Table> <Tr> <Td> above 0.950 0.900--0.949 0.850--0.899 0.800--0.849 0.750--0.799 </Td> <Td> 0.700--0.749 0.650--0.699 0.600--0.649 0.550--0.599 0.500--0.549 </Td> <Td> 0.450--0.499 0.400--0.449 0.350--0.399 0.300--0.349 under 0.300 n / a </Td> </Tr> <P> The population of Africa has grown rapidly over the past century, and consequently shows a large youth bulge, further reinforced by a low life expectancy of below 50 years in some African countries . Total population as of 2017 is estimated at more than 1.25 billion, with a growth rate of more than 2.5% p.a. The most populous African country is Nigeria with 191 million inhabitants as of 2017 and a growth rate of 2.6% p.a. </P> <P> As of 2016, the total population of Africa is estimated at estimated at 1.225 billion, representing 17% of the world's population . According to UN estimates, the population of Africa may reach 2.5 billion by 2050 (about 26% of the world's total) and nearly 4.5 billion by 2100 (about 40% of the world's total). </P>

The country with the largest population in sub-saharan africa