2006 - 2010, 774 mass gun murders and 10,000 gang killings out of a total gun related deaths over that four years of approximately 120,000, of wich more than 40,000 were homicides.

So annually, 30,000 gun deaths, 10,000 gun murders, 2,500 gang related and 194 mass shootings, usually at schools and perpetrated by current or ex students.

Kind of puts the difference between gang and rampage more in perspective:-

One twelfth and