Proposed Legislation and Crime Statistics

Are there published statistics of violent crimes committed in NJ with a firearm that breaks down the statistics by NJ FID card holders? I know that the senate doesn't want to use common sense approach to legislation,but how can you push through legislation or regulate a problem that doesn't exist? Could it be found unconstitutional to regulate us further if proven the laws already in effect are not being broken by the majority of FID holders and new laws would only be considered over regulation? I know I'm probably thinking to logically but had to vent, frustrated with the non-stop BS.