Delta pilot posted this info, where a pilot hired today will be on the list after so many years. They have done a lot of hiring and this shows just how much.

there are 14,103 pilots on the July seniority list

5 years (2028) - 11,500
10 years (2033)- 9,000
15 years (2038)- 7,200
20 years (2043)- 5,500
25 years (2048)- 3,300
30 years (2053)- 1,300
35 years (2058)- 350
39 years (2062)- 20

youngest pilot at DL retires in 2063