That's a tough question to answer, in part because the sands are often shifting, and in part because we have some international growth coming over the next 5 years. But...

ATL is, and has always been, pretty senior for WB B. Honestly, it will probably take better part of a decade for ATL. Conversely, NYC is, and has always been, the most junior WB B.

As Fastpilot said above, the most junior WB B has been going to about 70% in the company, but NYC might get to ~80% as we go forward. But very likely somewhere between those goalposts. Incidentally, DOH, or "years to hold" is a horrible metric, given the crazy hiring we have had in the last couple years, and the slight slowdown in pace of hiring coming. We will hire around 2400 total this year, 1700 next year, and 1300 annually going forward. With a current list of around 16500 & about 500 retirements a year, you can do some math, but suffice to say, if current (which is also the historic) trends hold going forward, you are probably looking at 4-8 years for 80% and 70% respectively in NYC. At least for planing purposes, that's what I would expect.