The data on deaths are calculated by the time of occurrence. The cut-off period is 30 days, and any events in the reference year reported after that time are included in the data for the following year. The data on international migration are based on the statistical arrival and departure forms. The data on internal migration are based on the arrival form only, which is the source of information on the previous place of residence as well. Rural population refers to the persons living in the population areas without any town and city signs.
Average population refers to the average number of inhabitants in a given year.
Asylum-seeker is considered a foreigner who arrived in Lithuania and applied for the refugee status. Immigration refers to the process of entering one country from another to take up permanent residence. Live birth is considered a delivery of a live born child, i.e. a child showing evidence of life irrespective of the duration of pregnancy. Up to 1991, infants weighting 1,000 g, pregnancy till 28 weeks, were ascribed to this category. Extra-marital births are considered live births delivered by unmarried mothers.