[kinoxi]

Pit bull and pit mixes account for 21 percent of all human fatalities

That sounds about right.

[Tribune7]

This is the relevant part.

Of the 28 dogs (not all pits as I understand it) responsible for a fatal attack between 2000 and 2001, 26 were males and two were females. Of the 26 males, 21 were sexually intact; he reproductive status of the remaining five male dogs could not be determined.