At best, unless there is some accurate study or questionnaire out there which is very doubtful, all your going to get are vaguely educated guesses and very limited anecdotal evidence.
There are some ways to answer this question...
One way is if there are any sexually active men out here. If they sleep with a lot of women, they can come up with an approximate percentage of how many women are shaved. For example, if someone here slept with 10 women and 7 of them were shaved, then he can say that 70% of the women he slept with were shaved.
Another way is if there are any females here that have been to a women's locker room. They can tell us if most of the women showering there are shaved.
Or a third way is if anyone here has been to a nude beach. But this will give us an inaccurate result because most people who go to nude beaches will usually groom themselves before going to one.