How many animal abusers are caught each year?

This is one of many-many sites on animal abuse:

The Chicago Police Department analyzed statistics from July 2001 to July 2004 on criminals charged in Chicago with animal abuses such as dog-fighting and discovered that 13 percent had also been arrested for sexual assault and 65 percent had been arrested for beating humans.

* http://www.itchmo.com/the-outrage-over-animal-abuse-1946