I am looking for number of pilots from the following regionals. I have to numbers from APC but some of them might be off by some significant numbers. I would like to create the statistics in terms of how airlines staff their airplanes.

If you can help me out with these, I'd appreciate it:

Envoy :
Endevour ;
ExpressJet :
Piedmont ;
PSA:
Mesa

thank you so much.