The United States ranks second, behind Norway, in the percentage of adults with bachelor’s degrees or better, according to the Center for Public Education.

Nations with highest percentage of population aged 25-64 with a 4-year degree, 2010
1 Norway 35%
2 United States 32%
3 Israel 31%
4 Nethelands 30%
5 Iceland 29%
6 United Kingdom 28%
7 South Korea 28%
8 Denmark 27%
9 Australia 27%
10 Canada 26%
Source: The Center for Public Education, "Getting Back to the Top"