Table 12 Data Declaration
Crime Trends, by Population Group, 2009-2010
The FBI collects these data through the Uniform Crime Reporting (UCR) Program.
General comments
- This 2-year trend table provides the number of offenses for 2009 and 2010 and the percent change between these 2 years, listed by population group.
- Metropolitan counties include sheriffs’ offices and county law enforcement agencies associated with a Metropolitan Statistical Area (MSA).
- Nonmetropolitan counties include sheriffs’ offices and county law enforcement agencies that are not associated with an MSA.
- Suburban areas include law enforcement agencies in cities with less than 50,000 inhabitants and county law enforcement agencies that are within an MSA.
- Suburban areas exclude all metropolitan agencies associated with a principal city. The agencies associated with suburban areas also appear in other groups within this table.
Methodology
- The data used in creating this table were from all law enforcement agencies submitting at least 6 common months of complete offense reports for 2009 and 2010.
- A crime trend represents the percentage change in crime based on data reported in a prior equivalent period. In calculating trends, the UCR Program includes only common reported months for individual agencies.
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 | 29,000 to 49,999 |
V | City | 10,000 to 24,999 |
VI1,2 | City | Less than 10,000 |
VIII (Nonmetropolitan County)2 | County | N/A |
IX (Metropolitan County)2 | County | N/A |
1Includes universities and colleges to which no population is attributed.
2Includes state police to which no population is attributed.
Population estimation
For the 2010 population estimates used in this table, the FBI computed individual rates of growth from one year to the next for every city/town and county using 2000 decennial population counts and 2001 through 2009 population estimates from the U.S. Census Bureau. Each agency’s rates of growth were averaged; that average was then applied and added to its 2009 Census population estimate to derive the agency’s 2010 population estimate.