Pure guesswork here.
Something between 5 and 10% have tried it, probably less than 2% do it on anything like a regular basis.
If it didn't have such a stigma attatched, maybe 20% would adopt female clothing, skirt, kilt, stockings, panties etc
How many would actually try for a female persona? Don't have any idea, but I think not many would keep it up after trying it.