The odds of being struck by lightning are 1 in 600,000 in the USA. Comparatively speaking you are 6 times more likely to be struck by lightning than you are to be killed by a dog of any breed. When you further break down the odds of being attacked and killed by a Pit Bull the odds are in your favor -approximately 1 in 145,000,000. That’s million folks. In contrast, you are 4 times more likely to be killed by a cow in the USA than any breed of dog, much less a Pit Bull.
While the numbers look nice, people don't invite lightning to live in their home. A percentage based on pitbull owners or a more individualized population would be better.
That said, I think pitbull puppies are pretty well the cutest things with four legs.