I got the data out of the College board trends in college pricing and then looked specifically in figures 12 & 13. Those figures are reported in 2014 dollars so I adjusted back to current figures using their CPI numbers in table A2.
Here's the trend:
Interestingly you can see that net tuition at private universities is actually down from 2007 to 2014. Of course nobody is reporting on that. In that same period published tuition rates are up ~33%. So while the press can say that tuition is up in the past 7 years the amount that students actually pay is down.
In the past 20 years net tuition at private schools is up 3.2% compounded annually and 4.4% at public schools.
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