Forbes article on Cato institute study on defensive gun uses...they culled through reports to get their number...
Disarming the Myths Promoted By the Gun Control Lobby - Forbes
A widely-known study conducted by
Gary Kleck and Marc Gertz in the 1990s found that there were somewhere between 830,000 and 2.45 million U.S. defensive gun uses annually.
A National Crime Victimization Study (NCVS) which asked victims if they had used a gun in self-defense found that about 108,000 each year had done so. A big problem with the NCVS line of survey reasoning, however, is that it only includes those uses where a citizen kills a criminal, not when one is only wounded, is held by the intended victim until police arrive, or when brandishing a gun caused a criminal to flee.
For these reasons, the Cato researchers investigated published news reports which much more often reveal how Americans use guns in self-defense. The data set is derived from a collection of nearly 5,000 randomly selected incidents published between October 2003 and November 2011. Still, the authors also recognize limitations with this approach, since many defensive incidents are never reported by victims, or when they are, never get published. In fact, the overwhelming majority of the successful self-defense outcomes are those where the defendants’ guns are presented but never fired.
Most of the actual self-defense shootings in the Cato study didn’t involve concealed carry licenses, but more typically had to do with responses to residential invasions. Of these, 488 involved home burglaries. In addition, there were 1,227 incidents where intruders were induced to flee the scene by armed inhabitants, circumstances that might otherwise have resulted in injurious assaults including rapes and murders.
There were 285 news accounts indicating that the defender had a concealed weapon license, which in the majority of these incidents took place outside a home or place of business. Pizza delivery drivers were common robbery targets.
Disarming the Myths Promoted By the Gun Control Lobby - Forbes