"In 2010, about 1.8 million nonfatal violent victimizations were committed by strangers, which was a 77% decline from 7.9 million victimizations in 1993. Violent victimizations committed by strangers accounted for about 38% of all nonfatal violence in 2010. Simple assault made up the majority (60%) of victimizations committed by strangers during the year, followed by aggravated assault (20%), robbery (17%), and rape or sexual assault (2%). From 1993 to 2008, among homicides reported to the FBI for which the victim-offender relationship was known, between 21% and 27% of homicides were committed by strangers and between 73% and 79% were committed by offenders known to the victims. From 1993 to 2010, the rate of nonfatal violent victimization committed by strangers declined 81%, from 37.7 victimizations per 1,000 persons age 12 or older to 7.1 per 1,000 (figure 1). Similarly, during the 18-year period the rate of violence committed by offenders known to their victims dropped 73%, from 39.4 victimizations per 1,000 persons age 12 or older to 10.5 per 1,000. The percentage decline in the rate of violence committed by strangers and the rate committed by offenders known to the victim from 1993 to 2010 was not statistically different."
NCJ 239424; National Criminal Justice 239424
Bureau of Justice Statistics: http://www.bjs.ojp.usdoj.gov/