Since April 1971, Freddie Mac has surveyed lenders across the nation weekly to determine the average 30-year fixed-rate mortgage rate. The purpose of the Primary Mortgage Market Survey® (PMMS®) is to survey lenders each week on the rates and points for their most popular 30-year fixed-rate (and other various loan products offered by lenders including: 15-year fixed-rate, 5/1 hybrid amortizing adjustable-rate, and 1-year amortizing adjustable-rate mortgage).*
The below graph shows the average interest rate on a 30-year fixed rate mortgage since 1971.