* A 1993 nationwide survey of 4,977 households found that over the previous five years, at least 0.5% of households had members who had used a gun for defense during a situation in which they thought someone “almost certainly would have been killed” if they “had not used a gun for protection.” Applied to the U.S. population, this amounts to 162,000 such incidents per year. This figure excludes all “military service, police work, or work as a security guard.”
* Based on survey data from the U.S. Department of Justice, roughly 5,340,000 violent crimes were committed in the United States during 2008. These include simple/aggravated assaults, robberies, sexual assaults, rapes, and murders.  Of these, about 436,000 or 8% were committed by offenders visibly armed with a gun.
* Based on survey data from a 2000 study published in the Journal of Quantitative Criminology, U.S. civilians use guns to defend themselves and others from crime at least 989,883 times per year.