I think the point this report (from UNESCO) is trying to make is that this "proper education alone" is not available for everyone to begin with. That said, clicking further it has a chart that shows more than 80% of countries have "some form of basic education" at least, which is double that of what it was 100 years ago.

But in countries where it is, it's highlighting that there's a way to go yet. It doesn't give all the data (after all, it's a website selling data) but it's pretty telling that a lot of countries that we think of as having good education (like most of Europe) are not in the top five.