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Life tables

Life tables consist of several functions of age, mathematically interrelated (including the number of survivors, number of the deceased, and probability of dying, life expectancy), describing theoretical process of population extinction as the population ages. Values of these functions are calculated on the basis of the age and sex specific death and population rates, observed during a given period (usually 1 year). Complete life tables are drawn up on the basis of data on persons deceased in a given year classified by the year of birth and completed age, the number of births in a given year and population by the year of birth – at the end of a given year and the previous year. Life tables since 2012 onwards have been developed for the first time based on the balances of the number of the population and its structure deduced based on the results of the 2011 National Population and Housing Census. Besides, there was introduced a change of the category of the permanent population, previously used in the calculation of the intensity of deaths and other demographic phenomena, into actually residing population or population living in a given area for a period longer than three months.

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Statistics Poland