“This is kind of like that old nonsense about shots fired in the air.”
The skull can be penetrated by bullet-sized objects with a velocity of only 200 FPS. The terminal velocity of falling bullets is in the 300 to 500 FPS range, so yes they can kill. There are many documented cases, particularly in countries where shooting into the air is a common activity for celebrations.
Oh well if your number is up it is indeed up I’d rather go quickly and without fuss than being run over by a bus.