I doubt it exceeds it exponentially
, but I take your meaning: it's well above your personal minimum. If it didn't, would you move to another city? If your dojo had to cut back on hours, would you leave?
I don't foresee this ever happening, because my dojo is strong.
However if I was in that situation, I'd have to start taking trips to the nearest local Dojo in my federation to fill in gaps.
But if it wasn't livable to travel, I'd likely move.