Uniform Crime Reports and Index of Crime in Polk in the State of Iowa enforced by Polk County from 1985 to 2005
Number of Violent Crimes Reported by Polk County by Year and Total
Year  Population Murder/ Man-
slaughter		 Rape Robbery Aggravated Assault Total Violent Crime
2005 37,437 0 5 3 95 103
2004 37,285 3 13 10 158 184
2003 37,087 1 12 13 155 181
2002 35,931 2 14 12 165 193
2001 38,106 0 15 10 104 129
2000 38,145 0 16 16 126 158
1995 35,022 1 18 17 103 139
1990 32,053 1 13 11 227 252
1985 39,259 2 7 22 210 241
1980 33,565 3 10 18 160 191
Iowa Counties
In 1930, the FBI assumed responsibility for managing the Uniform Crime Reporting (UCR) program, collecting data from 400 cities.  By 2006, over 15,000 law enforcement agencies submitted crime reports to the FBI, but since not all jurisdictions provide reports there is a possibility that you won't find complete data on some of our agency crime report pages.  In every case where the FBI has assigned a population to a jurisdiction, we are providing a page even though it may be blank. When a city located in a county starts submitting its own reports, the population assigned to the county is reduced to reflect that fact.  
Number of Property Crimes Reported by Polk County by Year and Total
UCR Crime Statistics prepared by the:
The Disaster Center
in association with the:
The Rothstein Catalog on Disaster Recovery
Index of the State of Iowa Uniform Crime Reports 

Index of United State's Crime Reports
Year  Population Burglary Larceny
Theft		 Vehicle Theft Total Property Crime
2005 37,437 258 757 137 1,152
2004 37,285 260 771 114 1,145
2003 37,087 283 701 141 1,125
2002 35,931 331 928 182 1,441
2001 38,106 292 985 182 1,459
2000 38,145 303 889 164 1,356
1995 35,022 410 1,010 194 1,614
1990 32,053 307 817 97 1,221
1985 39,259 477 1,061 88 1,626
1980 33,565 386 1,089 132 1,607
The UCR can be presented here because of the hard work of law enforcement statisticians who must classify and score each crime according to the strict criteria developed for the UCR.   Some agency's crime reports do not have a population associated with them, these may include: the highway patrol, state police, a drug enforcement agency, an environmental enforcement agency, a transportation utility, colleges, and others.  Areas may have many agencies performing the same or different law enforcement functions, and a population can only be assigned once, so it is not possible to formulate a crime rate for every agency.  
Violent Crime Index base upon 100,000 People
Year  Population Murder/ Man-
slaughter		 Rape Robbery Aggravated Assault Total Violent Crime
2005 37,437 0.0 13.4 8.0 253.8 275.1
2004 37,285 8.0 34.9 26.8 423.8 493.5
2003 37,087 2.7 32.4 35.1 417.9 488.0
2002 35,931 5.6 39.0 33.4 459.2 537.1
2001 38,106 0.0 39.4 26.2 272.9 338.5
2000 38,145 0.0 41.9 41.9 330.3 414.2
1995 35,022 2.9 51.4 48.5 294.1 396.9
1990 32,053 3.1 40.6 34.3 708.2 786.2
1985 39,259 5.1 17.8 56.0 534.9 613.9
1980 33,565 8.9 29.8 53.6 476.7 569.0
Knowing the trend of the rate of crime can be an important measure of the social health of our communities.  An unusually high rate may be caused by an isolated tragic event, the location of the jurisdiction in an area with a large industrial zone or that serves as a tourist destination, and a low rate may be caused by the assignment of crimes to multiple agencies serving the same area, only one of which can be assigned the population, or an error in the number of crimes reported.
Property Crime Index per 100,000 People
Year  Population Burglary Larceny
Theft		 Vehicle Theft Total Property Crime
2005 37,437 689.2 2,022.1 365.9 3,077.2
2004 37,285 697.3 2,067.9 305.8 3,070.9
2003 37,087 763.1 1,890.2 380.2 3,033.4
2002 35,931 921.2 2,582.7 506.5 4,010.5
2001 38,106 766.3 2,584.9 477.6 3,828.8
2000 38,145 794.3 2,330.6 429.9 3,554.9
1995 35,022 1,170.7 2,883.9 553.9 4,608.5
1990 32,053 957.8 2,548.9 302.6 3,809.3
1985 39,259 1,215.0 2,702.6 224.2 4,141.7
1980 33,565 1,150.0 3,244.5 393.3 4,787.7
The UCR does not include a record of every crime reported to law enforcement, and every agency does not submit data in the form that the FBI requests.  The most accurate number of crimes reported are those involving death.  The least accurate is the number of rapes that are reported. The the number of case of rape reported does not include attempted rapes.  Aggravated Assault does not include cases of simple assault, (which are the largest number of assaults reported to police) and so constitutes only a portion of the total number of reported assaults.  The number of Aggravated Assaults used here was arrived at by subtracting the number of Simple Assaults from the Total Assaults reported by each agency.  For a few agencies, this process resulted in the generation of a negative number (their UCR report wrongly indicates that there were more simple assaults than the total number of reported assaults).

The magnitude of a threat/risk is measured by its frequency and effect. By this definition crime may well constitute the single greatest risk/threat we face today.   If you have questions, comments, or suggestions, please see our FAQ page first at: http://www.disastercenter.com/UCR.html and feel free to post a message to host@disastercenter.com.  
 

National Criminal Victimization Survey, 1996 estimate that only  37% of rapes are reported to police

The Disaster Center provides online coverage of disasters in the United States, compiling and providing links to disaster related statistics and studies: US Crimes Data from 1960  Tornado, Nonfatal occupational Injuries and Illnesses, Fatal Occupational Injuries, Motor Vehicle Traffic Injury and Fatality Data,  Child Nursery Equipment and Toys: Accident Rates by Age, Sports & Recreational Equipment: Injuries by Age and Sex, Home, Heating, Plumbing, and Appliance: Injuries by Cause, Age, and Rate, Furniture, furnishings, household, and personal use items: Accident injury rates by Age, Home, Work Tools and Misc. Items: Accident Injury rates by Age. US Cause of Death Data , US Anti--terrorism Threat/Risk Policy prior to September 11, 2001,  US Nuclear, Biological and Chemical Terrorism Policy prior to 9--11  Atlantic Hurricane pages and index.  Total student, Number of school--associated Violent Deaths and Number of Homicides and Suicides of Youth Ages 5–19, by Location: 1992–2002  Crimes and Indexes for USA Metropolitan Statistical Areas 


Index of the State of Iowa Uniform Crime Reports ---- Index of United State's Crime Reports
The Disaster Center
IA07700