Pew Research Center. (2012). What do you think is more imporant - proteching the right of Americans to own guns, or controlling gun ownership (United States, July 2012). Retrieved from http://www.statista.com/statistics/237372/survey-on-the-importance-of-gun-control-and-gun-ownership-in-the-us/.
You could also use the link to the original article on the Pew Research Center site and cite that instead. Here is an APA citation for the page from which Statista drew the data for the ciation listed above:
Pew Research Center. (2012). Views on gun laws unchanged after Aurora shooting. Retrieved from http://www.people-press.org/2012/07/30/views-on-gun-laws-unchanged-after-aurora-shooting/.