I found it a bit ironic.
Guess we can thank Mr. Gaston Glock for them being the record holder.
More to the point, I've always said, for all hoopla about restrictions in (and I am para-phrasing) other "first world countries!" they seem to have absolutely zero problem exporting their "tools of death".
I guess keeping tabs on their own citizens is one thing, but turning a nose up to cold hard cash when it comes to the rest of the world is a rather easy decision.
Edit: I know the graph is from 2009, but I have no problem assuming these numbers are the same, if not greater, in 2016. I would wager there is NO decrease at all across the board in last 7 years.