Thanks a lot. I appreciate your support. And yes, i also find quite annoying to be surrounded by so many "wise" people, always prepared to punctuate the alien work.

But said that, i really appreciate some of the "constructive comments". I will improve my english version of the title of the graph, and i also i'm working to redo the graph using the number of primary school students instead total inhabitants, per calculate the ratio of "teachers per capita".

In this point it was a fail of me... wanting to go too much fast 😔 i've discovered that in that UNESCO database there is the data of how many enrolled students are per country and school level 😁

Indeed, please, do you know if i must do a NEW PUBLICATION or can i modify this one "replacing one graph by the new one"? I mean that i would prefer this one delete it. But i'm not very friend of "delete nothing" (as a general rule). I think that the history of the things is important to exist too.

What do you think? (thanks in advance!)