Europe's population is set to undergo significant changes by 2100. Ukraine, Lithuania, and Albania are projected to see declines of 61%, 57%, and 40-50% respectively. On the other hand, some microstates like Monaco are expected to experience a remarkable 24% increase, with Luxembourg and Liechtenstein following at 10% and 9% growth.

In contrast, Central Europe anticipates a more modest decrease of 12% by the end of the century. Meanwhile, countries such as the UK and Sweden are poised for population growth, with projections of 7% and 3% respectively. Additionally, France and Switzerland are expected to see increases of 2% and 3% by 2100.