From the Document: "Since 1930, the Federal Bureau of Investigation's (FBI's) Uniform Crime Reporting (UCR) program has collected and published annual crime data. These data are typically delayed by about nine months, and since 2020 the FBI has also released quarterly crime data. Although the release of 2021 crime data is not anticipated until late summer or fall 2022, data for the first quarter of 2021 was expected to be released in early 2022. However, the FBI has announced that due to low participation rates [hyperlink] it was unable to release all of the quarterly 2021 crime data. The FBI stated that it was not releasing the expected quarterly data due to agency participation falling below a 60% participation threshold.[...] The FBI plans to release the full year of 2021 data [hyperlink] with confidence intervals to indicate a lack of precision in the data; however, the FBI said it would not publish percentage change estimates or compare estimates to prior years. The FBI further stated that it will not release state-level estimates if the participating LEAs in a state cover less than 80% of the state population. Given these participation rates, Congress may consider a range of options to expand implementation of the National Incident-Based Reporting System (NIBRS)."
CRS Insight, IN11936
Congressional Research Service: https://crsreports.congress.gov/