Unfilled vacancies (future newhire slots) from the first snapshot:
EWR 756 FO - 16
SFO 320 FO - 22
SFO 737 FO - 29
SFO 756 FO - 24

More 756 vacancies than I expected. Also surprised that EWR 756 has unfilleds - I was under the impression that it was some of the best flying in the system.