Salmo g-
Those numbers came from the draft 2022 co-managers PS Chinook management plan's stock profiles so assume they are current and from a significantly time series.

I had also been told the Skagit Falls and those summers spawning in the larger Creeks have similar yearling contributions as the Sauk summers while those summers spawning in the main stem Skagit have a much lower yearling contribution (2%?). But do not have a hard copy so did not report that.

Curt