I looked at AA's 2014/2016/2018 hiring. Took guys hired in April of those years who are retiring in the summer of 2037. So the 2014 guy was 43 yrs old when he got hired, the 2016 guy was 45 yrs old, and the 2018 was 47 yrs old. Actually everyone was approx. 3 months short of the listed ages.

DOH/current seniority number/final seniority number -
2014 - 12900 - 835 (best estimate, manual counting)
2016 - 13800 - 1305
2018 - 15000 - 2100

A 43 yr old hired today would retire at 1300(?). A 45 yr old would retire at 1660(?). And a 47 yr old would retire at 2100. Based roughly on April hiring months for 2014/2016/2018.

What about the 43 yr old that waits until he's 45 to get hired? His 1300(?) retirement number becomes 2150(?) if he waits 2 years (hired at 45) and becomes 3300 if he waits four years(hired at 47). At AA delaying for four years would cost him exactly four years of G4 CA job at the junior base using today's numbers.

All public math, and finger counting, so I'd welcome any corrections. Unfortunately the union's automated projection site isn't working.