Suicide accounted for 60% of all U.S. gun deaths in 2017. Firearm suicides have outnumbered gun homicides since the CDC began publishing data in 1981. Guns are used in just over half of all suicides.
“Mass shootings” are hard to define. But according to the latest CDC data from 2016, active shooter incidents make up less than 2% of all gun deaths in the U.S. annually. Using Mother Jones’s definition of mass shootings, which counts four or more killed in a single incident in a public place, mass shooting deaths represent an even smaller fraction (< 1%) of all gun deaths in the U.S. annually.