Which country has the highest education?

This is an interesting question which probably doesn't have a clear answer. First, the thing in question is highest education level reached, though a better statistic would probably be adult literacy level. On a raw numbers basis it is likely to be India in terms of graduates of tertiary schools. A scan of statistics indicates literary proficiency levels are highest in Europe, in particular Sweden and Switzerland. Obviously the United States does not rank high in either but is higher than the third world countries. So here perhaps, the first, second, and third world paradigm gets support.