meaningless for path as many can continue leeching off younger junior staff well into their 70s. Path is so different than many other fields that the age-out they predicted when they gave an excuse to drastically increase the number of training slots wont occur.
There is only one profession, and not just medical mind you, where the number one most likely cause of discontinuation of working is DEATH and that is path. Meaning, a majority of prac. paths practice (in some form) literally until the moment of seeing the Reaper (Insert Mony Python's Meaning of Life skit).