Employment Rates and Age, More Work and More Years
By Nathan Yau

In 1935, the United States Congress passed the Social Security Act to provide financial support to those 65 years and older. Full retirement age would slowly rise to 67 by 2022 after legislation passed in 1983. Meanwhile, it grew more common for women to work than to not, especially in the 1970s.

https://flowingdata.com/2024/11/14/employment-decades/