In the United States, states with higher gun ownership rates have higher rates of overall and gun homicides, but not higher rates of non-gun homicides.[74][75][76] Higher gun availability is positively associated with homicide rates.[77][78][79] There is evidence, however, that gun ownership has less of an effect on rates of gun homicide than it does on gun suicide.[80] In the U.S. in 2011, 67 percent of homicide victims were killed using a firearm: 66 percent of single-victim homicides and 79 percent of multiple-victim homicides.[81]