The basic figures showing the size and age distribution of the population are derived from population and housing censuses and from additional statistical balances on births, marriages, divorces, deaths and migration. Since 2005 the source of data for migration is the information system of the Alien and Border Police and the information system of population register.

All the published indicators show final figures on the population with permanent residence in the given area (irrespective of citizenship). The data since 2001 reflect the Population and Housing Census 2001 results include foreigners who were granted asylum, foreigners with visas over 90 days who stayed in the Czech Republic more than 1 year and since 1 May 2004 also citizens of the EU countries with temporary stay and citizens of non-member countries with a permanent stay in the Czech Republic (with reference to the so called Euro-Amendment to Act No. 326/1999 Coll., on the stay of foreigners). The data are converted to correspond to the territorial structure in force as at 31 December 2005, expect Tables 3-9. and 3-13.

Mid-year population: the number of inhabitants in a given area as balanced as at 1 July of the reference year.

Age of person: In demographic statistics it refers to the completed age at the moment of survey (the age at the last birthday).

Dependency ratio: the ratio of the number of inhabitants aged 65+ to the number of children under 15.

Live-born child: a child who after delivery gave at least one sign of life and whose birth weight is 500 g or more, or whose birth weight is below 500 g if the child survives 24 hours after delivery. A stillborn child is a child who does not give any sign of life and whose birth weight is 1 000 or higher.

Stillbirth rate: the number of stillbirths per 1 000 births in total.

Total fertility rate: the number of live births per one female provided that the fertility rate remains the same, throughout the female’s whole childbearing period, as in the year given.

Total abortion rate: the number of abortions per 1 female throughout her childbearing period provided the abortion rate remains the same as in a given year.

Infant mortality: the number of children who died within 1 year of age per 1 000 live births.

Neonatal mortality: the number of children who died within 28 days of age (i.e. at the age of 0 to 27 complete days of life) per 1 000 live births.

Abortion: a premature termination of pregnancy, classified by physician as abortion if certain criteria are met. The data on abortions are taken over from the Institute of Health Information and Statistics of the Czech Republic.

The data on deaths analysed by cause are classified according to the International Statistical Classification of Diseases and Related Health Problems (ICD-10) in force since 1 January 1994. The Institute of Health Information and Statistics of the Czech Republic is responsible for correct application of the classification.

Life expectancy: the number of years probably lived by an x-year-old person provided the survivorship function established by the life table remains unchanged throughout the person’s remaining life. The regional life tables are compiled for two-year periods so that accidental fluctuations can be avoided.

Natural increase in population: the difference between the number of live-born children and the total number of deaths in the given area in the reference year.

Total increase of population is the difference between the initial and end levels of the population in a given area. It is derived as the sum of natural increase and net immigration.

Migration: in this Yearbook, it refers to migration of persons from their permanent residence in one administrative territory to permanent residence located in another administrative territory.

Marriages are included in the respective area according to the groom’s place of permanent residence or the bride’s place of permanent residence where the groom’s place of permanent residence is abroad.

Divorces are monitored on data provided to statistical authorities by courts of justice.

FOREIGNERS

A foreigner is a person, which does not have the Czech citizenship. A foreigner is allowed to stay in the Czech Republic either temporary or permanently. Long-term stays over 90 days include temporary stays of the EU citizens and further visas over 90 days and residence permit for a long-term stay for citizens of non-member states.