of course criminals can get guns illegally. there are so many of them in circulation. Since 1989, manufacturers and importers introduced an average of 3.5 million new guns into the U.S. market each year. By contrast, the U.S. resident population has grown an average of 2.7 million a year. That's roughly 800,000 extra guns a year. The domestic production of pistols has doubled since 1980, while domestic production of rifles has fallen 40 percent, and shotguns 14 percent. In 1980, pistols made up less than 15 percent of total firearm production in the U.S.; by 1993, they had climbed to 40 percent. According to a 1992 review of the scientific literature, most studies find that gun density is positively associated with the murder rate.The National Institute of Justice, for example, reports a study of U.S. cities which found a positive correlation between gun ownership levels and felony gun use and felony murder.
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