My observations say they were up. Jacks are 1.5 yr old males that sexually mature, return to tribs, spawn and die just like 2.5s, 3.5s and the rare 4.5s. They appeared to be in exceptional condition with some making it to 10 lbs.
Biologists from the Salmon world have said that a higher number of jacks means the year class is well represented. Jacks play an important role in wild populations as they are able to reach upstream gravel during low water years while having an easier time avoiding predators.
Merry Christmas!