In the case of tables of population, vital statistics and migration since 2015 are published balance only for the first half and year. There are not disseminated quarterly tables about the population (quarter 1, 2, 3, 4 and 1-3). The reason for the lack of quarterly tables are delays in the transfer of data from Registration Civil Office to the statistics, and consequently the lack for each quarter of full information on the number of facts of vital statistics and migration. These delay are caused by the implementation (since March 2015), a new system of the Ministry of Interior for the registration of civil status acts (computer system Źródło).