| Belgium | | Federal Police; drug offences registered by the police. |
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| Bulgaria | | Ministry of Interior - General Directorate "Police"; arrests for drug law offences and General Directorate "Combating Organized Crime"; arrests for drug and precursors related law offences. |
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| Czech Republic | | Czech Supply Reduction Focal Point: Czech Republic Police Forces and General Directory of Customs.
Criminal Statistics Record System of the Police of the Czech Republic (crime offences) and Statistics of the Ministry of the Interior - Department for General Administration (administrative offences) |
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| Denmark | | National Commissioner of Police |
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| Germany | | Bundeskriminalamt (Federal Criminal Police Office)/Polizeiliche Kriminalstatistik (PKS) |
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| Estonia | | Ministry of Justice: State Register of Criminal Matters |
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| Ireland | | Central Statistics Office |
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| Greece | | Central Anti-Drug Coordinating Unit |
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| Spain | | Centro de Inteligencia contra el Crimen Organizado (CICO). Secretaría de Estado de Seguridad. Ministerio del interior. |
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| France | | Office central du trafic illicite de stupéfiants (OCRTIS) |
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| Italy | | Department for Civil Administration Personnel Policies and for Instrumental and Financial Resources. Ministry of Internal Affairs - Central Directorate for Anti-Drug Services. Ministry of Interior |
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| Cyprus | | Drug Law Enforcement Unit of the Cyprus Police |
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| Latvia | | Information Centre of the Ministry of Interior |
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| Lithuania | | Criminal Police Bureau |
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| Luxembourg | | RELIS Drug Monitoring System |
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| Hungary | | Unified Criminal Statistics of the Investigation Authorities and the Public Prosecution (ENYÜBS) |
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| Malta | | Police Force |
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| Netherlands | | National database OMDATA; Public Prosecutor; Analysis conducted by the Research and Documentation Centre (WODC); Ministry of Security and Justice |
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| Austria | | Federal Ministry of the Interior; Police data. |
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| Poland | | Police Headquarter |
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| Portugal | | Institute on Drugs and Drug Addiction - IDT,I.P./DMFRI |
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| Romania | | Superior Council of Magistracy |
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| Slovenia | | General Police Directorate |
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| Slovakia | | Ministry of Justice |
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| Finland | | National Bureau of Investigation, Source: Polstat Law Enforcement Statistics database, Ministry of the Interior |
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| Sweden | | National Council for Crime Prevention |
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| United Kingdom | | Ministry of Justice, Scottish Government & Northern Ireland Police Service |
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| Croatia | | Ministry of the Interior |
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| Turkey | | Law Enforcement Agencies: National Police, Gendarmerie & Customs |
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| Norway | | Statistics Norway |
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