Not sure if I'm reading this right but per the NCHS (via the CDC)[1][2][3], in 2013, for people aged 15-24, ~6500 died relating to motor vehicle injuries whereas ~6000 died relating to firearms (although ~2000 of those were suicides -- not sure how that factors in, but it's probably important). Anyways, it seems like an awful lot of people kill themselves with guns, so perhaps we should just consider it a binary: if something is lethal, treat it with all the care you can muster.
Wow. In the UK we see (from memory) around 4500 road deaths pa, and 4-40 gun deaths. It's not even close - you msg remember that America is the outlier for guns in almost all ways
Edit: drat, and the site you can use to get more stats: http://webappa.cdc.gov/sasweb/ncipc/leadcaus10_us.html
[1]: http://tinyurl.com/qfqn5oz
[2]: http://tinyurl.com/on9lyfc
[3]: http://tinyurl.com/ov5je39