The core element of the data police departments supply to the FBI is the total reported incidents of select criminal offenses (“Index Crimes”).52 Since the program’s inception, the FBI has included the crime of rape as one of the eight Index Crimes for which police departments could submit data.53
In addition to a count of reported crimes, the FBI annually issues the rate of crime nationally and for each jurisdiction using this basic formula: Crime Rate = (Reported Crimes/Population) x 100,000 Thus, the crime rate is defined as the number of reported criminal incidents for every 100,000 people.54 For the study period, and since the UCR’s inception, its narrow
definition of “rape” required: “carnal knowledge of a female forcibly and against her will.”55 By employing the phrase “carnal knowledge,” that definition only includes a man vaginally
penetrating a woman with his penis, not oral or anal penetration.56
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