Census data, it goes back way farther, but conflates things pre-1975 along a lot of variables since that was barely post-segregation.

Not sure how you're getting 42k: https://www.minneapolisfed.org/about-us/monetary-policy/infl... spits out 51k for that number.

In either case, IMO, +-10% over 60 years should just be considered flat. Calling it flat is probably generous considering how inflation has affected durable goods vs necessities. We can buy more appliances now, but places to put them have never been more expensive relative to income.