A bar chart showing the change in employment rate since 2019 for different age groups: 65 and older, 55 to 64, 45 to 54, 35 to 55, 25 to 34 and 16 to 24. Americans who are 65 and older — past the traditional retirement age — have not returned to work. But employment for those between the ages of 55 and 64 has bounced back.