Where will it end?

I just found this great graphic from the UC Accountability Report 2012. It demonstrates the skyrocketing PDST UC wide.

Professional degree average student charges, Universitywide, 1994-95 to 2010-11

Eyeballing these numbers, most of these programs show a 100-400% increase in tuition in just over a decade. This is steep, even relative to the rapidly rising in undergraduate tuition.

The question to ask is how long is this sustainable? Is there a point when tuition cannot go any higher? I'd like to think so.