I should've been more specific that it's 1 out of 4 young women (younger millennials) who don't shave but it's not hard to imagine the trend continuing. However I don't think a much higher percentage of older women shave just based off observation. The reasons for not shaving are probably different though. Young women don't shave out of some kind of feminist protest. Older women have a more lax shaving regimen because most are married or in a long-term relationship and nearly everyone becomes more relaxed about grooming once they're comfortably not single. - This part is just my opinion.