From your link:
32 U.S. dog bite-related fatalities occurred in 2013. Despite being regulated in Military Housing areas and over 700 U.S. cities, pit bulls contributed to 78% (25) of these deaths. Pit bulls make up about 6% of the total U.S. dog population.
What's the big deal?
If 6% of any population commits 78% of all killings, it's just a coincidence!
< /s >