These are the confirmed numbers of who has left since October 2017.
37 Captains (7 from bellow 500 senirotiy, who probably hit 65)
11 Fo's
10 So's
Total 57
The list is not 100% accurate with regards to the SO's and Fo's as the list with DEFO messes up the numbers.
This does not include the pilots that have given notice, these are the ones that have phsically left the building.