"Just 51% of borrowers whose took out loans from 2010-12 have made any progress at all in paying down their debt." I pay 486 a month. I got my undergr

"Just 51% of borrowers whose took out loans from 2010-12 have made any progress at all in paying down their debt." I pay 486 a month. I got my undergrad in 1999, MA in 2001, PhD in 2013, my 50k in debt has never gone down. I only pay interest.