Population Growth 1950 - 2020 by UN data
I continue
In the 20 years since the publication of "World Population Prospects: The 2000 Revision", you can take the results and determine the adequacy of the demographic models used by the UN in its forecasts. In the global plan, the UN almost guessed - although the population for 2020 is slightly larger than the "medium" option, it is closer to it than to the "high" one. At the regional level, disagreement begins - few countries are in the middle range. This is due to several aspects:
1) The UN did not guess the rate of falling fertility in Asian countries such as Iran and Africa
2) The “medium” varinat did not take into account fertility recovery in Eastern Europe
3) In many countries there are problems with population statistics (Ukraine, I'm talking about you) and migration
4) Obviously, the UN did not incorporate military conflicts into its model, such as the Syrian Civil War
5) I don’t understand in what dream of reason they found 2 million people in Bhutan at the turn of the millennium