"The average yearly net price of public four-year universities in tuition and fees, after discounting grant aid and tax benefits, declined from $2,080 to $1,540 in inflation-adjusted dollars between 2005-06 and 2010-11, according to data from the national College Board survey.
The net price for private colleges declined in those years from $12,750 to $11,320. Add the cost of room and board, and public university students pay an average of about $10,000 a year, a few hundred dollars more than five years ago. Private university students pay a little over $20,000, a bit less than in 2005-06."
I wrote about this earlier in the year. See As college costs rise, sticker shock eased by student aid. It mentions how financial aid is really just a form of price discrimination.