Receiving a better education than one’s parents sounds like a tenet of the American Dream, but it’s a reality more commonly achieved in other developed nations.

The U.S. ranked fourth-worst among 29 developed countries for children obtaining a higher level of education than their parents, according to a report released Tuesday by the Organization for Economic Cooperation and Development.

In the U.S. only 21.6% of those 25 to 34 years old achieved a higher level of education than their parents. That compares to an OECD average of 36.8%.