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Home • Crime in the U.S. • 2014 • Crime in the U.S. 2014 • Tables • Table 8 • Table 8 by State • Table 8 - Iowa

Table 8 Data Declaration

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Table 8 Data Declaration

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Offenses Known to Law Enforcement, by State by City, 2014

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

Important note about rape data

In 2013, the FBI UCR Program initiated the collection of rape data under a revised definition and removed the term “forcible” from the offense name. The UCR Program now defines rape as follows:

Rape (revised definition): Penetration, no matter how slight, of the vagina or anus with any body part or object, or oral penetration by a sex organ of another person, without the consent of the victim. (This includes the offenses of rape, sodomy, and sexual assault with an object as converted from data submitted via the National Incident-Based Reporting System [NIBRS]).

Rape (legacy definition): The carnal knowledge of a female forcibly and against her will.

General comment

This table provides the volume of violent crime (murder and nonnegligent manslaughter, rape, robbery, and aggravated assault) and property crime (burglary, larceny-theft, and motor vehicle theft) as reported by city and town law enforcement agencies (listed alphabetically by state) that contributed data to the UCR Program. (Note: Arson is not included in the property crime total in this table; however, if complete arson data were provided, they will appear in the arson column.)

Caution against ranking

Readers should take into consideration relevant factors in addition to an area’s crime statistics when making any valid comparisons of crime among different locales. UCR Statistics: Their Proper Use provides more details.

Methodology

  • The data used in creating this table were from all city and town law enforcement agencies submitting 12 months of complete offense data for 2014.
  • The FBI does not publish arson data unless it receives data from either the agency or the state for all 12 months of the calendar year.
  • When the FBI determines that an agency’s data collection methodology does not comply with national UCR guidelines, the figure(s) for that agency’s offense(s) will not be included in the table, and the discrepancy will be explained in a footnote.

Population estimation

For the 2014 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 2010 decennial population counts and 2011 through 2013 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 2013 Census population estimate to derive the agency’s 2014 population estimate.