According to question, Uniform Crime Reports (UCR) is the best data source for answering this question .
Violent crime is divided into four offenses under the FBI's Uniform Crime Reporting (UCR) Program: murder and nonnegligent manslaughter, robbery, and aggravated assault. The UCR Program defines violent crimes as offenses that involve the use or threat of force.
The Uniform Crime Reporting (UCR) Program generates precise statistics for use by law enforcement. It also provides data to the general public, the media, academics, and students of criminal justice.
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