Sixteen. But eleven of those moves took place from ages 19-29 when I changed apartments like some people change shoes (not looking at you @hollydolly).
Did others also move a lot during your early adulthood?
Yes I did...one more than @StarSong, many times as a child, and also as an adult in my first marriage every 12 months to new Naval married quarters.. ( 17 in total)
Physical boundaries? Yes, we had boundaries of certain busy streets, but could otherwise wander the neighborhood during daylight hours without restriction, didn't you?