I like this careful choice of words:
In the 18 years before the 1996 reforms, Australia suffered 13 gun massacres — each with more than four victims — causing a total of 102 deaths. There has not been a single massacre in that category since 1996.
He had to add that, to avoid the need to acknowledge the knife, sword, and axe rampages they've had since the ban.
...Or the fact that "sword violence" was so bad, they must now be licensed and registered.