According to UN Population Division median estimates, Niger's population will increase 866 per cent from 2015 to 2100.
The country is estimated to grow from 19,897,000 people to 192,187,000 people.
The population of the entire planet is predicted to reach 11.2 billion globally by 2100.
The top ten countries for percentage growth during this period are predicted to be:
- Nige, 866 per cent
- Angola, 520 per cent
- Zambia, 486 per cent
- Somalia, 468 per cent
- The United Republic of Tanzania, 464 per cent
- Burundi, 435 per cent
- Uganda, 432 per cent
- The Democratic Republic of the Congo, 397 per cent
- Middle Africa, 390 per cent
- Mozambique, 382 per cent
Here's a world overview.
View the map below:
Here's how the largest countries in the world will change:
The UK's population is predicted to grow from 65,397,000 to 80,975,000 by 2100.
The full datasets are available on the UN Population Division website here.