Hello. After some suggestions of other users, i've redo this graph using the number of primary students instead of the number of total inhabitants per each country.

The new graph is here: https://www.reddit.com/r/dataisbeautiful/comments/zzjcgj/oc_top_20_countries_with_the_highest_number_of/

I'm a newbie publishing here, so please don't hesitate to let me know the best way to "update" an already published graph, like now. Thanks for your help.