 The average lifespan was 70.8 years in 1970, documented as 77.5 in 2022. There also seems to be a variability depending on where you live. For example, in a list of places with the longest longevity, coming in at number five is Rutherford County, where life expectancy is 76.2 years. Murray County is number 14 with 75.3 years, and Williamson County is number one at 81.3 years. I'm Ron Jordan reporting.