The increase in tuition costs has actually been relatively small. The price for tuition, fees, room and board at public 4-year colleges for in-state residents increased from $7,400 in 1990-91 (2012 dollars) to $12,110 in 2012-13. At private non-profit institution the net price increased from $18,330 in 1990-91 to $23,840 in 2012-13.
UC Irvine is 2x that while not on campus ($24,693.97) and much more on campus ($31,667.97) for CA residents. Add $22,878.00 for out of state to get ~46k off campus and ~53k for on campus[0].
Granted, it is a UC in Orange County, but your numbers are 1/2 to 1/3rd of the true numbers. Is the rest of the country really that much cheaper than California?