There were people shouting 10 years ago. They were shouting that harvest rules allowing wild fish retention( up until Feb 28th) was devastating the early portion of the wild run. Some of us believe that this management philosophy was used to artificially seperate the wild and hatchery runs. And there are those that believe the early portion was important to the viability of the wild run.
If the runs were just being impacted by only the natural life cycles then I would expect to see the 20 year average to be relatively flat.