I have no statistics to base this on, but the fleet on which I did my last 7 years in the RAF is now haemorrhaging (and this is NOT an exaggeration) pilots through a combination of PVR and non-assimilation (i.e. folk leaving at the end of their SSC or PC). I think in the latter case that the vast majority don't want to extend service anyway. Airlines are recruiting steadily and jobs are comfortably available.
Just before I left I was amazed at the first tourists doing their ATPLs - amazing! Getting their parachutes ready so they could eject when fed up with proceedings. Can't blame them.