The average number of incidents per year from 2009-2012 was 16.
Businesses are the most common location for these types of attacks. School are the second most common location.
Active Shooter Incident Trends 2000-2012
According to a study recently released by the FBI, from 2000 to 2012, the number of active shooter incidents in the United States has increased, particularly after 2008.
Published: January 27, 2014