| a Due to changes in methodology, the 2006 national crime perpetration rates are not comparable to other years and cannot be used for yearly trend comparisons. See Criminal Victimization, 2006, http://bjs.ojp.usdoj.gov/index.cfm?ty=pbdetail&iid=765. |
| b Homicide data were not available for 2009 at the time of publication. The number of homicides for 2008 is included in the overall total for 2009. In 2008, homicides represented less than 1 percent of serious violent crime and the total number of homicides by juveniles has been relatively stable over the last decade. |
| NOTE: The offending rate is the ratio of the number of crimes (aggravated assault, rape, and robbery, i.e., stealing by force or threat of violence) reported to the National Crime Victimization Survey that involved at least one offender perceived by the victim to be 12–17 years of age, plus the number of homicides reported to the police that involved at least one juvenile offender, to the number of juveniles in the population. Because of changes made in the victimization survey, data prior to 1992 are adjusted to make them comparable with data collected under the redesigned methodology. |
| SOURCE: Bureau of Justice Statistics, National Crime Victimization Survey and Federal Bureau of Investigation, Uniform Crime Reporting Program, Supplementary Homicide Reports. |