I'm not sure where you are getting that number from. I don't know a single person in my group of family, friends, and coworkers that doesn't have a case on their phones. Heck, I even know two different people that have one of those wallet style cases. Whether it is for resell value, image perception, longevity, hand-me-down to family members, or OCD, I think most people want to keep their iPhone protected as much as possible.Probably about 10% of users put the phone in a case, if that