I'd imagine it is pretty low, but I am one of the exceptions.
I was diagnosed as having "classic" male pattern baldness and handed a prescription for Propecia. I ended up going the natural route (no, not snake oils, but a rather unconventional, little known process) and it has stopped my hairloss. I haven't lost any hair in the past 2 years and what I have is getting thicker and vellus hair is filling in.
Now, maybe I do have male pattern baldness and this process is reversing it? Or maybe male pattern baldness isn't what we think, but either way, I have miniaturized hairs and was losing in a pattern, but if you go by conventional knowledge, it would be male pattern baldness, but there is no way that I should be reversing it with this treatment, but I am.
Keep in mind, I am 6 ft. 125 pounds, so I'm not exactly your average male. I also had chronic indigestion and burning of the esophagus, which is also gone now too.