Comparing current escapement to early 2000, 1990 and 1980 is not a good comparison. Back in 1980, that's when the highest number of hatcheries were in operation, the number of brook stock increased dramatically. However, in 1990 the ocean survival rate dropped and the salmon escapement numbers dropped, this is further impacted by closure of numerous hatcheries and that further decreased return rate. Over the years the number kept on dropping due to continuouse bad ocean survival rate and the limited funding available to SEP that reduced the salmon production rate further.
At current return rate we are still slightly better than pre-1980's numbers (before hatcheries).
By limiting all sectors' catch rate this may temparary slow down salmon stock declining rate, but will send a false signal to government that the fishery is recovering and hence, no additional funding is required.
If comparing adult spawner number from BC to that of Washington State (similar salmon migration route), where Washington has an ongoing stable hatchery funding the number has been increasing steadily (dispite of DFO claimed poor ocean survival rate). The reduction of funding for hatcheries in BC is the major contribution to overall decline.