"… Between 2004 and 2012, the student loan debt grew by 14% every year to $966 billion from $510 billion. On the other hand, student outstanding loans rose by 70% between 2008 and 2013. Based on these rates, student loans are expected to soar further in the coming years.
To put this into perspective, if the current rate of growth is considered, the outstanding value of student loans in the US might hit $2 trillion by 2024." …
https://learnbonds.com/news/us-student-loan-debt-has-more-than-doubled-in-10-years/