If you look at the permanent bid packets for the east, there is attrition every bid, just not age 65 attrition which is where the bigger numbers are. Generally, more people go out on medical than return and there is a dribble of early retirements (at least I assume so since the bid packet doesn't say how many change their mind). I haven't really tracked the numbers, but 5-10 a month sounds about right. At the high end of that, and looking ahead toward the age 65 retirements kicking in, there may be a need for no more than about 200 replacements in 2013. But till toward the end of 2012 the dribble of hiring is about all you can expect. Assuming the fleet size remains static (+/- 1 or 2 planes), which I assume will be the case. Any changes up or down more than that would obviously alter the numbers needed. No more than 10% of attrition is needed for training float with a static fleet, and the lead time is 2-3 months, i.e., 100 line pilot retirements and 30 early/medical means no more than 13 pilots for the training float in 2013.
Oh, that's just east BTW.
Jim