...According to Natalia Kolesnikova, an economist with the Federal Reserve Bank of St. Louis, calculated the data based on the 2003 National Survey of College Graduates, a joint project of the U.S. Census Bureau and the National Science Foundation.
USA Today Report via the awesome Community College Dean blog.
So, basically the lesson is, just go to a 4-year university straight out of college! Duh! Why can't everyone else just do that? I mean, come on!