What is the oldest known age of salmon and steelhead (in completed years)?

Salmon Species and its Ages
Pacific salmon: 7 yrs
Chinook Salmon: 7 yrs
Sockeye Salmon: 7 yrs
Silver Salmon: 4 yrs
Chum Salmon: 6 yrs
Pink Salmon: 2 yrs
Atlantic Salmon: 8 yrs
Steelhead Trout: 8 yrs