Most are unprovoked attacks. The breed type being discussed is bred historically and today for dog “pit fighting”, an activity illegal in all 50 states and many other countries.
There are very specific traits bred into these dogs that make them wholly unsuitable for household pets.
Now, and for the last 35+/- years, they have been attacking people and pets in ever-increasing numbers, mauling, maiming, and killing.
If you have any further interest, more information can be supplied.
51%? 98%?
And I thought we were talking about dog biting in general. I was unaware you were pushing an agenda against a certain category.
The problem is that if you are talking about "pit bulls" it is a generalization so broad as to be unusable, it is like the gun grabbers using "assault weapon".
You might as well call them "short haired dogs with four legs"