Table 31, Data Declaration

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Number and Rate of Arrests
by Population Group, 2006

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

General comments

Methodology

Population estimation

The FBI calculated 2006 state growth rates using revised 2005 state/national population estimates and 2006 provisional state/national population estimates provided by the U.S. Census Bureau.  The FBI then estimated population figures for city and county jurisdictions by applying the 2006 state growth rate to the updated 2005 U.S. Census Bureau data. 

Population groups

The UCR Program uses the following population group designations:

Population Group Political Label Population Range
I City 250,000 and more
II City 100,000 to 249,999
III City 50,000 to 99,999
IV City 25,000 to 49,999
V City 10,000 to 24,999
VI City1 Less than 10,000
VIII (Nonmetropolitan County) County2 N/A
IX (Metropolitan County) County2 N/A

1Includes universities and colleges to which no population is attributed.
2Includes state police to which no population is attributed.

If you have questions about this table

Contact the FBI’s Criminal Justice Information Services Division via e-mail at cjis_comm@leo.gov or by telephone at (304) 625-4995.