loan debt in the U.S. has now surpassed $1 trillion, for the first time ever exceeding the total amount of credit card debt held by Americans.

And what’s worse, students are being forced to borrow almost twice as much as they were just 10 years ago, the College Board told USA Today.

That’s what led to a spike in student loan amounts and drove 2010′s total loans to more than $100 billion, another new record, accounting for roughly $4,963 for every full time undergrad student.

What’s worse, Americans are increasingly defaulting on their student loans, with failures to pay going from 6.7 percent in 2007 to 8.8 percent in 2009. An added bonus: most defaults came from students at private, for-profit schools, which have grown by more than one-third over the last 10 years.

The growth in student lending may be the next major market bubble to burst, according to a recent report by Moody’s Analytics (PDF).