Gun owners as a percentage of each state's population in 2007.
<a href="//commons.wikimedia.org/wiki/User:Ali_Zifan" class="mw-redirect" title="User:Ali Zifan">Ali Zifan</a>
CC BY-SA 3.0
Own work; Map is based on <a href="//commons.wikimedia.org/wiki/File:Blank_US_Map.svg" class="mw-redirect" title="File:Blank US Map.svg">here</a>. Source of data: <a rel="nofollow" class="external autonumber" href="http://usliberals.about.com/od/Election2012Factors/a/Gun-Owners-As-Percentage-Of-Each-States-Population.htm">[1]</a>