Wow, cool tool.
What's interesting is the many western nations which are on a path to decreasing or stable populations.
With history as a guide, this will likely shift power towards the Eastern/Asian region. Look at the predicted population for Bangladesh, for example. Predicted to double to about the population of the US today in the next 50 years. France, on the other hand is forecast to have a smaller population in 2050 than in 2025.