These figures were calculated using the data analysis system for the 2007-2008 National Postsecondary Student Aid Study (NPSAS) conducted by the National Center for Education Statistics at the US Department of Education.

(...)The median cumulative debt among graduating Bachelor's degree recipients at 4-year undergraduate schools was $19,999 in 2007-08. One quarter borrowed $30,526 or more, and one tenth borrowed $44,668 or more. 9.5% of undergraduate students and 14.6% of undergraduate student borrowers graduating with a Bachelor's degree graduated with $40,000 or more in cumulative debt in 2007-08. This compares with 6.4% and 10.0%, respectively, for Bachelor's degree recipients graduating with $40,000 or more (2008 dollars) in cumulative debt in 2003-04.

(...)Graduate and professional students borrow even more, with the additional cumulative debt for a graduate degree typically ranging from $30,000 to $120,000. The median additional debt is $25,000 for a Master's degree, $52,000 for a doctoral degree and $79,836 for a professional degree. A quarter of graduate and professional students borrow more than $42,898 for a Master's degree, more than $75,712 for a doctoral degree and more than $118,500 for a professional degree. At the 90th percentile cumulative debt for graduate and professional degrees exceeds $59,869 for a Master's degree, $123,650 for a doctoral degree and $159,750 for a professional degree.