Tin foil hat time again...
Too bad PP is such a [Bleeeeep!] website for trying to post data or screen shots.

Looking up Chinook releases into Puget Sound region by state, tribal, feds on the coastwide hatchery release data base www.rmpc.org shows a ad clip mark rate of the brood years contributing to this years adults (2018-2020 broods) of 85% which is exactly the same as the mark rate of the three broods prior to 2018-2020.