Ok, but I think you’ll need to rephrase your question to get any meaningful answers.
Do you only want to know about wheelchair users? Or would people who use crutches/walking sticks also be of interest? What about those with mobility problems who don’t use any aids? To get a clear picture, you need to ask a clear question.
You might also consider creating a poll, to offer different options. You’ll find instructions here: Forum Posting Basics - #14 by ralphm