this indicator for education call average years of schooling, which accounted by Barro&Le, depending on Psacharopoulos Method. these data ending for the year 2000, I need after this year until 2018.
Another likely source is the 'Documentation Centre' of the UNESCO International Bureau of Education; see http://www.ibe.unesco.org/en/how-we-work/knowledge-creation-and-management/ibe-documentation-centre