In the directory file, for all the loan and debt numbers it says "suppressed for n=30". What is "n"?
I would guess that n probably means number of students in cohort, but am not sure. Gainful Employment reporting I know is not publicly released when n<30 due to privacy reasons.
Here is some suppporting documentation: "[F]or elements that we expect to highlight on the consumer-facing College Scorecard, a separate version of the element is vailable that suppresses the data for schools with fewer than 30 students in the denominator to ensure the data are as representative as possible."