I see 11 charts that predate 1980. Here's a housing chart that goes back to 1900 https://www.statista.com/statistics/1041889/construction-year-homes-usa/ https

I see 11 charts that predate 1980. Here's a housing chart that goes back to 1900 https://www.statista.com/statistics/1041889/construction-year-homes-usa/ https://www.statista.com/statistics/1041889/construction-yea... Hard to say, but it looks like linear growth to me. Here's "housing starts" which looks to me to be mostly flat from 1960 to 2020, with some cycles up and down.