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Comparability

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Population and Education, Social Statistics
Annika Klintefelt
+45 39 17 36 78

akf@dst.dk

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Population Projections

Each projection is a new statistics and is not meant to be used with former years projections.

In 2010 Statistics Denmark made a common projection with DREAM for the first time. With the new common projection the projection model was changed. The new model was primarily based on DREAM´s former model.

Comparability - geographical

The projections on provinces and municipalities are made in the same way for all the provinces and municipalities, and the results are therefore comparable.

Eurostat makes it´s own population projections for all the EU-countries including Denmark. Results from two different projections will always differ, due to the fact that there is an almost unlimited number of possibilities regarding the assumptions. The results from Eurostat´s projections are therefore different from the results from Statistics Denmark´s projection.

Comparability over time

When comparing results from two different projections one should be aware that the assumptions and jump-off population changes from year to year. The latest projection is always the most updated one.

Coherence - cross domain

The migration concept used in the projections differs from other statistics.

Immigration in the projections includes persons, who were not in Denmark by the beginning of the year, who immigrate during the year and who are in Denmark by the end of the year. Emigration in the projections includes persons, who were in Denmark by the beginning of the year, who emigrate during the year and who are not in Denmark by the end of the year. Immigration and emigration are therefore different from the disseminated numbers for migration, where all the flows are counted. Including for example immigrants who emigrate before the end of the year.

The population in the projection is broken down by year of birth. Therefore the age regarding deaths and migrated is calculated as age by the end of the year and not as age by the time of death or migration.

Coherence - internal

The projections for the entire country, provinces and municipalities are three different projections. However coherence is achieved by adjusting the levels in the projection by provinces and municipalities to the levels in the projection for the entire country.

Some very small differences still exist due to rounding.