By some estimates, America’s privately owned gun stock increased by 70 million between 1994 and 2014. By 2015, American citizens owned 255 million guns, or more than one for every adult in the country—far and away the highest rate in the world. As Vox’s German Lopez explained it, Americans made up “about 4.43 percent of the world’s population [in 2015] yet owned roughly 42 percent of the world’s privately held firearms.”
