???? Based on current fertility rates and age structures, here are the largest declines in population expected by the UN from 2022 to 2100:

???????? South Korea –53%
???????? Ukraine –49%
???????? China –46%
???????? Cuba –42%
???????? Poland –42%
???????? Japan –41%
???????? Greece –39%
???????? Italy –38%
???????? Thailand –38%

The UN calculates its projections based on age structure, current fertility rates, *and* the way that it expects fertility rates to evolve in the future. In all of the countries listed, they actually expect fertility rates to bounce back, as shown here.