Parliamentary elections are held in Finland every four years. Statistics Finland produces official statistics from the elections; preliminary data are produced and made available on the Internet on the day following the actual polling day, final statistics (as a conventional paper publication) in the year following the election year. Detailed data on parliamentary elections since 1995 can be found on Statistics Finland’s website on the specific page designated for them in the list of statistics by topic, and on elections since 1983 in the StatFin online service. Statistics Finland receives the basic data for the elections from the Ministry of Justice’s election information system, the technical implementation of which it has assigned to TietoEnator Group. Statistics Finland’s election data system comprises four election data files: regional file, party file, candidate file and candidate register.