Note that http://www.guardian.co.uk/news/datablog/2011/jan/10/gun-crime-us-state states that NY only had 445 murders by firearms in 2011, which again for 20 million people makes this fairly comparable to the rates in France wich has much stricter gun control.

I was a bit curious about that number of 750 murders with firearms per year in NY (I assume state, not just NYC), so I tried to find statistics in France, where I live.

I only found statistics for 1999 so it's pretty old, but we had 2600 deaths by firearms in the whole (roughly) 60 million-people country, including 2000 suicides (does that count as murder in your number?) and 100 accidents (not sure if that means self-accident or killing someone else).

Anyways, 600 people died of firearms outside of suicides for 60 million people that year. Sounds way too many for me, but then compared to 750 for NY (which Wikipedia says about 20 million people) it's still about three times less.