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Variance Estimation

NIBRS Estimation Project

Beginning with the 2021 data year, estimates of crime known to law enforcement will be based solely on data provided to the FBI's National Incident-Based Reporting System, or NIBRS. In 2021, 67.9% of all crime-reporting law enforcement agencies were reporting to NIBRS, covering 65.7% of the U.S. population.

NIBRS Coverage, 2017 to 2021

To calculate a national crime rate based on NIBRS data, BJS, in partnership with the FBI and...