And for those who question 5ish years here is the math:
469 (Total Number of Pilots) - 100 (Pilots who won't flow- Arbitrary number)=369
(369/6) (6 is derived from the Average Attrition plus the flow number)=61.5 months
61.5/12 (This breaks it down to years) = 5.12 years or 5 Years and 3 months

Always subject to change obviously, but the trend won't go down for the foreseeable future.