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Country background is the person's own, the mother's or possibly the father's country of birth. Persons without an immigrant background always have Norway as country background. In cases where the parents have different countries of birth the mother's country of birth is chosen. If neither the person nor the parents are born abroad, country background is chosen from the first person born abroad in the order mother's mother, mother's father, father's mother, father's father.
Division for population statistics
From 1 January 2003 the definition was changed by also including the country of birth of the grandparents.