Offences investigated, 2002

National, county and police district level.

Annual. Normally published in the third quarter of the year subsequent to the statistical year.

Because of changes and other circumstances, the statistical years from 2002 and further are published later and with irregular intervals.

Reporting some statistics to the Eurostat and UN .

Raw data files of whole-year files from the Police Computing Service are stored electronically. Volume files with completely processed material are stored electronically (volumes from 1987 have been adapted to the new technological platform).

The statistics describe how the police and prosecuting authority settle offences when investigation is completed, percentage of solved offences, alleged offenders when investigation is completed (persons charged) and recidivism among these. The statistics on completely investigated offences has been published annually from 1957 included. The statistics is used to describe the registered crimes from 1960 up to today (separate statistics on Offences reported to the police exists from 1993 and are used for this purpose if trends are to be described from this time).

After a gradual transition from reporting through forms to reporting electronically (completed in the years around 1990), the central police registration system (STRASAK) has been the basis for the stistics. In 2002 there was made changes in the processing in accordance with new structure for the police districts and the subsequent alteration in the police's registration systems (BL/STRASAK/PAL).

Major users are the media, research and education sector, interest organizations, the Ministry of Justice and the Police, and other public services and institutions associated with the justice sector. Beyond this the statistics serve as the basis for information for others interested in the status of and trends in crime.

No external users have access to the statistics and analyses before they are published and accessible simultaneously for all users on ssb.no at 8 am. Prior to this, a notice is given in the Statistics Release Calendar. This is one of the most important Principles for Equal treatment of users in releasing statistics and analyses.

The statistics over investigated offences one of four main crime statistics in the area of Crime and the justice . The others are Offences reported to the police , Sanctions , and Imprisonments .

In general the offences included in the statistics offences reported shall same or later years be represented in the statistics over investigated offences, sanctions and imprisonments (see separate statistics for Criminal prosecutions, in Norwegian only ). When using the crime statistics it is, however, important to be aware that the various parts do not necessarily refer to the same population of offences within the same statistical volume. It can take a long time from an offence is reported until it is investigated and possibly sanctioned, in some cases years. The units counted ar also dissimilar in the different statistics, although offences are counted quite similar for reported and investigated offences. The tables on offences reported to the police are therefore not comparable with the other crime statistics.

Other closely related statistics at Statistics Norway are: the Survey of level of living, victims and crime (exposure to violence and theft), Victims of offences reported to the police , Police and prosecution - StatRes and Causes of death (murder).

Of related external statistics, the Police directorate (POD) also publish figures on percentage of offences solved and time of dealing with cases, based on investigated offences in STRASAK/PAL (only available in Norwegian ), but these are to be considered as operation statistics for the police, and should not be read as the official crime statistics. These statistics are also defined and produced on other criteria than used by Statistics Norway, and do not have directly comparable figures. The Norwegian National Criminal Investigation Services (Kripos) also publishes figures on homicides, but these statistics are counted from another definition of the selection than SSB's statistics over investigated offences (among other things the year of action, not the year of decision with legal efficacy).

Statistics Act §§ 2-1, 2-2, 3-2 (forms/registers).

Not relevant

The statistics cover all offences completely investigated within the statistical year. The statistics provide information about the type and number of offences, police district, scene of crime, the police decision, and the persons charged at completed investigation. It provides information about the age, sex, citizenship and place of residence, and recidivism of the persons charged. (see descriptions of concepts and variables in Definitions, and estimations in Collection of data revision and estimations).

From 1992 included, the statistics cover both crimes and misdemeanours. Previous years the statistics only cover crimes (see Definitions and Sources of error). Misdemeanours against the Road Traffic Act and Duty Act in which the sanction is imposed as a on the spot fine, are not covered by the statistics (see instead statistics on Sanctions ).

Each offence with a legal decision makes one unit in the basic material. Before 1994/1995 the practice was that several offences could be registered as one (see Comparability over time and space).

From 1991 the data source is completely EDP based and drawn from the central police registration system, STRASAK, which covers all completed investigations of offences recorded byNorway's police districts (BL) as part of the processing of the criminal case. From 2002 the selection is decided in STRASAK, but the actual data extension are done through the police' analysis and management tool (PAL).

The various police districts are asked to provide corrected information in the cases where Statistics Norway finds logical errors and missing information in the data material. The statistical process includes information from the national register (see Population statistics), and previous volumes of statistics on investigated offences.

Not based on random sample but a complete selection, the statistics shall contain all offences and persons charged in criminal cases the police and prosecuting authority has registered as completely investigated during the year, see Population, Collection of data editering and estimations, Confidentiality and Comparability over time and space. The selection is also described in more detail, see Definitions of the main concepts and variables under Definitions.

The data files are collected in digital form from Norwegian Police ICT Services (previously The Norwegian Police Data Processing Service (PDMT)) mid January. Norwegian Police ICT Services runs out the data from STRASAK/PAL. The register is centrally completely updated the day (longer before) after local registration in BL (this is less relevant than earlier). With that, Statistics Norway can obtain information about two weeks days after the end of the statistical period. Information on incorrect entries and missing data is obtained from the police districts and Police ICT Services in the course of the first and second quarter of the year though error tables. Information related to persons is electronically connected from SSB's population register.

The register systems of the police contain some validity controls of data. In addition, Statistics Norway undertakes controls and editering of the material. For example will deficient information on scene of crime by municipality, be added municipality to the extent possible out of other information from the register.

An overview of all controls and Statistics Norway's processing routines are found in "Statistikk over etterforskede lovbrudd. Dokumentasjon", Notater 1999/52, StatisticsNorway. Validity controls in STRASAK/PAL and Statistics Norway's processing routines are redeveloped as needed, resulting in constant improvement of the data material (see Comparability over time and space for new routines from 2002).

Figures are not based on estimations, as the three basic units consists of complete counts of the data from the police registers (for an account of concepts, see Definitions of the main concepts and variables under Definitions):

• All offences completely investigated are counted, with given characteristics (e.g. type of offence, police district and police decision). From these numbers the percentage of offences solved are calculated, in total and for each type and group of offence.
• All unique charged person are counted, and the number of these with given characteristics (e.g. sex and age). For persons with more than one offence during the year the principal offence are applied by the use of an indicator of graveness based on maximum and minimum sentence beside other characteristics of the criminal procedure.
• Recidivism is counted as charges during the last five statistical years against persons (with full personal identification number) charged in the statistical year prior to these five.

Calculations in per cent and per 1 000 inhabitants (5 year and up) are being made by use of number of inhabitants 1'st of January in the statistical year (also for each age group, sex, and geographical area - see Population statistics ).

Not relevant

The statistics implies particularly sensitive personal information and information on punishable offences considered as extremely sensitive. Statistics Norway administers the data basis for crime statistics with great caution. When releasing statistics showing few units, the protection of privacy is considered on each incident.

There are many conditions that can be significant for the comparability over time of the different crime statistics, and is not described in a broad manner here. But a few central changes during the last decades can be pointed out:

Introduction of Strasak ca. 1985-1990
Before the 1980s individual forms with data on the crime cases were obtained from police districts and recorded by Statistics Norway. Oslo switched to edp based registration in 1979, followed by the police districts in Agder in 1981. STRASAK was introduced at the various police departments in subsequent years, and by the end of 1991 all districts had switched to electronic registration. A while after STRASAK was introduced at the various police districts, reporting to Statistics Norway was done electronically.

A reorganisation in 1984 entailed that STRASAK cover crimes finally given a legal decision during the statistical year (not completely investigated before a possible trial, as was previously the case). The previous selection criteria were, however, maintained for the police districts that did not report with STRASAK after 1984 (see Sources of error and uncertainty under Sources of error). When departments switched to reporting with STRASAK the selection criteria were changed. Because the selection criteria were different for the various departments, and were changed in conjunction with the transition to electronic reporting by the individual districts, some crimes were counted twice in the period from 1984 up to 1991/1992. The extent of the double registration caused by these transitions is uncertain. Probably there were not many double registrations, but it may have happened with certain serious crime cases where a charge was handed down at the end of the year in question.

New registration practice 1994/1995
Each offence with a legal decision makes one unit in the basic material. This has been the practice since 1994/1995. Before this, only one offence was registered when:

• Several offences were committed in one act against one victim. The most serious offence was registered.
• The same person committed several homogeneous offences over a period of time against one victim.
• One offence was committed as a path-breaker for the other offence.

More offences were, however, registered when an offence was committed to hide another offence, just as the practice since 1994/1995.

STRASAK has been under development for a long time regarding to quality assurance and registration of details. Because of this development the data source of the statistics contains more information than before. The changeover in 1994/1995 to registering all offences is of great importance, and caused an increase in the number of investigated offences in the statistics without there necessarily being more offences investigated.

Reorganisation of Strasak in 2002
As of 1 January 2002, a new structure for the police districts was established; where for one thing the number of police districts was halved. Statistics Norway has as result of this, and the following technical re-adjustments in the central police criminal register system (BL/STRASAK/PAL, from October 2002 included), changed the routines for producing the statistics on offences investigated. News on statistics on offences investigated from 2002 included:

• New police districts replace the previous geographical division. The possibilities of comparing these to statistics on police districts prior to 1 January 2002 are to a great extent restricted.
• Several persons charged without registered and valid official Norwegian reference number are being identified if they have committed more than one offence. This gives a somewhat lower number of persons charged and a higher number of persons charged with more than one offence, for persons committing offences when on a temporarily residence in Norway in particular.
• Statistics on the number of accessories shows to a greater extent the actual number of offenders with who the person charged has committed the offence in cooperation with. This involves a somewhat higher number of accessories than it would have been out of the previous method of surveying these.
• Transfers to Conflict Council are only made available as settlement valid in law only against persons charged over the age of consent. This involves that the number of transfers to Conflict Council decreases, and that prosecutions dropped, the offender not liable, become correspondingly more.

After a thorough examination of the different data basis and crime statistics, in addition to dialogue with Norwegian Police ICT Services, Statistics Norway is of the opinion that the statistics on offences investigated from 2002 and following, has become fairly comparable to previous years. The police reform, together with the changes made in Statistics Norway's own categories is however of some importance to comparability of the statistics over longer time.

Other changes
Also other changes have been made, contributing to higher quality of the statistics, and influencing the comparability over time.

National Authority for Investigation and Prosecution of Economic and Environmental Crime inNorway(Økokrim) have been included in the statistic since 1995. After The National Criminal Investigation Service (Kripos) also was given prosecuting authority in 2005, the police district category "Special agencies" have been specified in tables, which includes both agencies.