How many states have shot clocks

[zm1283]

Missouri doesn't have the shot clock, but I've noticed that two new gyms this year have shot clocks installed above their backboards. I guess some of the newer baskets have shot clocks already attached to them? One of them had the shot clocks directly above the rim, but it stuck out an inch or two in front of the backboard. We had two shots hit one of the shot clocks.