Hans Rosling was the guy that created Gapminder, one graph of which is below. This is pretty awesome. It simultaneously tells the life expectancy and per capita income of every country in the world over the last 200 years. Different color bubbles indicated different continents. The size of the bubbles vary by population size. The size of the bubbles change as the years pass to reflect population growth. The Gapminder site has so much interesting information about the world. There is so much to learn about on the Internet if you want to actually learn.
https://www.gapminder.org/tools/#_chart-type=bubbles
https://www.gapminder.org/tools/#_chart-type=bubbles