I was hired near the end of 2015.
According to myseniority.com , there are just over 1000 FO’s senior to me that can hold captain.
I am just over 1600 numbers from the junior captain.
In the next five years, 887 pilots senior to me will retire.
An FO in my seniority (finishing 3rd year) can currently hold all domiciles, and at 50-60% seniority except MCO (75%) and ATL (85%).