Hot Water Heater Age?

Hi Everyone
Can anyone tell me the age of this this Johnwood/GSW hot water heater?
Serial# 8068918863
Model# JW525TSC
This is a Canadian manufacturer.
Thank you in advance.

Patrick; Both those two brands of tanks use the first two digits as year built.

1980 At least all the ones I've encountered. We see a lot of John Wood and GSW tanks in our area.