According to myseniority.com , I’m currently at 74% as a late 2015 hire.

Captains retiring that are senior to you:
within 12 months - 99
within 2 years - 244
within 3 years - 386
within 5 years - 759
within 10 years - 2157
within 15 years - 3496

There are approximately 1190ish above me that can hold it.