I would compare it to others areas you are planning to buy in. If you have one family in the neighborhood that is continuously disturbing the neighborhood, it could possibly account for a huge chunk of the calls. The police should be able to answer that as well.
I had a condo once where we would have to call several times a week when a certain couple were beating each other regularly. It was just part of the routine of the building (sad, yes), but those statistics didn't hold for the entire neighborhood and they eventually moved out.... more