LOL, I know why you think that. There was a false document floating arround on the internet saying that. It has been recognised as beeing false and there a lot of sites dicsussing why the document was false.
I you search on the UT archives you'll find the references. It came up a few years ago.
Again, you've been fooled. Rubbish. Even officials in Tasmania and New South Wales have acknowledged marked increases in violent crimes since the new laws went into effect 10 years ago.
The 'recognition' to which you're referring is a British study, due large to changes in the way data was collected and reported.