I am surprised the age would be so young. My dad retired at 67 but went right back to work a year later, still working now (71). Health insurance do be expensive. I wonder how this statistic would capture someone like him. My mother was working until she died at 60, but would have likely been in a similar situation, trying to keep working as long as possible, certainly was not looking at retirement within a year or two.
My wife's parents are younger (late 50s) but in the same boat, there is no path to retirement for them and they plan to just keep working. The only people I know who managed to retire by any conventional definition are or were Silent Generation.