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Home • Crime in the U.S. • 2010 • Crime in the U.S. 2010 • Data Decs • Table 4 Data Declaration

Table 4 Data Declaration

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Crime in the United States, by Region, Geographic Division, and State, 2009–2010 

The FBI collects these data through the Uniform Crime Reporting (UCR) Program.

General comments

  • This table provides the estimated number of offenses and the rate (per 100,000 inhabitants) of crime in each region, geographic division, and state in 2009 and 2010, and the 2-year percent change in each. 
  • For 2009, Illinois data for murder, robbery, aggravated assault, burglary, larceny-theft, and motor vehicle theft were available only for 137 law enforcement agencies. For other Illinois agencies, the only available data generated by the Illinois State Program were totals based upon an incident-level system without indication of multiple offenses recorded within single incidents. Therefore, the UCR Hierarchy Rule could not be applied in order to convert the state’s data to the Summary Reporting System format. (The Hierarchy Rule requires that only the most serious offense in a multiple-offense criminal incident is counted.) To arrive at a comparable state estimate to be included in national compilations, the Illinois State Program’s totals for agencies other than the 137 referenced above were reduced by the proportion of multiple offenses reported within single incidents in the National Incident-Based Reporting System database. 
  • For 2009, the data collection methodology for the offense of forcible rape used by Illinois (with the exception of Rockford, Illinois) did not comply with national UCR Program guidelines. In both years, the data collection methodology for forcible rape used by Minnesota (with the exceptions of Minneapolis and St. Paul, Minnesota) do not comply with national UCR Program guidelines. Consequently, their figures for forcible rape were estimated for inclusion in this table. 
  • The UCR Program does not have sufficient data to estimate for arson. 

Caution against ranking

Any comparisons of crime among different locales should take into consideration relevant factors in addition to the area’s crime statistics. Variables Affecting Crime provides more details concerning the proper use of UCR statistics.

Methodology

  • The data used in creating this table were from all law enforcement agencies in the UCR Program (including those submitting less than 12 months of data). 
  • Crime statistics include estimated offense totals (except arson) for agencies submitting less than 12 months of offense reports for each year. 
  • The FBI derives state totals by estimating for non-reporting and partially reporting agencies within each state. Using the state’s individual agency estimates, the UCR Program aggregates a state total. 

Population estimation

The population estimates used in this table are U.S. Census Bureau provisional estimates as of July 1, 2009, and July 1, 2010.