I tried to confirm this for Cincinnati. Zillow reports that the median list price/square foot in Cincinnati was $131 in March 2019. In March 2011, it was $82 (roughly $93.20, adjusted for inflation). That is a huge increase proportionally, and that's only going back 8 years. I would be shocked if the increase isn't more severe going back to 1990.

Source: https://www.zillow.com/cincinnati-oh/home-values/