Al - assuming you're asking a genuine question & not looking for us to guess the correct answer, I would say anecdotally that most go in their early 30s, once they've had their fun & the Mrs starts to complain about the b**geration factor, long dets, constant turbulence etc. Whilst that's the mean there's a big spread with another mini peak at 5 years after award of PAS once the additional pension has been consolidated. A very few soldier on for the full 'career' (see the Derek Oldham thread!) All my own thoughts of course, nothing statistically based.