that is exactly what the sources do, if you bothered to look. this one puts it best

"The reality of self-defense gun use bears no resemblance to the exaggerated claims of the gun lobby and gun industry. The number of justifiable homicides that occur in our nation each year pale in comparison to criminal homicides, let alone gun suicides and fatal unintentional shootings. And contrary to the common stereotype promulgated by the gun lobby, those killed in justifiable homicide incidents don’t always fit the expected profile of an attack by a stranger: in 35.5 percent of the justifiable homicides that occurred in 2012 the persons shot were known to the shooter. The devastation guns inflict on our nation each and every year is clear: more than 33,000 dead, more than 81,000 wounded, and an untold number of lives traumatized and communities shattered. Unexamined claims of the efficacy and frequency of the self-defense use of firearms are the default rationale offered by the gun lobby and gun industry for this unceasing, bloody toll. The idea that firearms are frequently used in self-defense is the primary argument that the gun lobby and firearms industry use to expand the carrying of firearms into an ever-increasing number of public spaces and even to prevent the regulation of military-style semiautomatic assault weapons and high-capacity ammunition magazines. Yet this argument is hollow and the assertions false. When analyzing the most reliable data available, what is most striking is that in a nation of more than 300 million guns, how rarely firearms are used in self-defense.14"