The longest time you had you WoW subscription active?

I was thinking just now that I have had my WoW subscription active without pausing it since 2007. I've never paused it at all, even though there had been many times when I would go for weeks and even months without playing. Time goes by so fast. 18 years! Seems so strange how much time has passed.

What's the longest period of time you have had an uninterrupted WoW subscription?