By this metric, United States is doing very well. Over 50% of Americans aged 25-34 have completed tertiary education, putting us at the 5th position within OECD, well ahead of countries like Germany, Sweden, France, Italy, Denmark, or Poland.

I don't think it's a meaningful metric, though, because most tertiary degrees are a waste of time, and higher university graduation rate can be worse if that translates to more people getting useless degrees.