Barbara,
I have met many women turners through our Chapter events, maybe it would be better said, women that have tried turning, but few of these belong to a club or the AAW. A lot of the ones I've talked to seemed to be hesitant to enter what they consider to be a male dominated area (chapters etc.) The common thread amoung the women in our chapter is that they are very confident in their ability and have a healthy respect but no fear of the machinery they need to complete the task. A look at the women at an AAW symposium and you see most of the women attending have made a name for themselves both as turners and artist/demonstrators. I know this doesn't answer your question about numbers but it seemed relevant at the moment. 🙂