From 1968-1972, I went to a private school with annual tuition at about $3,000/year. I think the average annual increase since then has been abut 5%, to about $23,000/year.
RE: From 1968-1972, I went to a private school with annual tuition at about $3,000/year.
According to this Inflation calculator from the BLS:
http://data.bls.gov/cgi-bin/cpicalc.pl?cost1=3000&year1=1970&year2=2014
$3,000 in 1970 would be about $18,358 today.