There are 10 books of adventure "paths" and two more adventures. That is 2 per year since it has come out, not one per year. You also mentioned you do AL, which, if I understand correctly is a separate thing (set of adventures)? That seems like a lot.
However, I admit my group is really slow and your not the only one on these boards who chews through adventures at, IMO, a break-neck pace. I don't think your extremely out there compared to some, but compared to the norm I think you are. We are too, just the other extreme!