There are a few common themes across all the boards, here and pprune etc.
1. A lot of people have had enough of being screwed and have the benefit of having qualified for a pension / edp, as a result of this they are going.
2. A lot of other people are too young to get the pension / edp immediately and are waiting for the day to arrive when they can leave with the money.
3. Premature departures once qualified for a pension are not reflected in the stats, surprisingly.
4. A 5% PVR rate is the norm, as has been said elsewhwre there are minor peaks. No stats are available for withdrawal of PVRs submitted, some are withdrawn following a sudden surprise promotion or suitable posting being offered.
5. It was all better years ago - a matter of perception, I joined in the late 1970s, my SNCO when I got out of training had been in longer than I had been alive. I am now well into that situation. Those that join now will not experience what we did, as I did not experience what my previous SNCO did.
If you are considering leaving by PVR or NGR - check the terminology for terms and conditions through the admin AP, available on a good intranet terminal near you, see which is most beneficial and do it. For my situation it was NGR, 18 months of getting my life sorted then out to live long (I hope) and prosper (also hoped for).
Look after yourselves, the system won't, your management chain can't and the airships only have a target number to meet.