As of 2006, 39% of Americans aged 25-34 had a tertiary credential.  While that level that has remained roughly constant for many years, there is some evidence that it it is now on the decline.  At least 10 countries have exceeded the U.S.'s current attainment levels. Moreover, the U.S. now ranks second in the world for the percentage of students who begin a tertiary education program, but fail to complete it.