I'd say a high percentage (80% to 90%) have purged at least once.
For myself, two major purges: @ 17 and 29 years old.
The first was at the end of high school. I 'decided' to quit my nasty habit, so it all went into the bin. I held out for about two months before I had to buy 'something' girly.
For the second, it was a choice between my wife and my clothes. I didn’t think twice about it. With the exception of my panties, it all went into the bin.
Love & Stuff,
Donna