So, how do you number your bowls? Is it as they are completed, or as you had turned them (as in green bowls that may have been sitting around for 6 months)?

I was thinking about this because I turned a green bowl a week ago, but it'll sit for quite some time before it is finished. If I turn other bowls (not green) they'll be finished way before this one. I would think that by numbering your bowls, you are in essence giving a timeline and showing your progression as a turner. Thus, showing how your skills improve. But, with green bowls being turned, this kinda screws that whole thing up. My form, shape, and skill set (going from basic to more fancy) might change dramatically in 6 months, yet the bowl I just turned is limited in what it can "become" with its final turn.

So, what say you? On what basis do you "number" your bowls/turnings?