The data set contains a list of the first nationality of all persons who have their main residence in the state capital of Düsseldorf (single apartment), as well as the first nationality of all persons holding their secondary residence in the state capital of Düsseldorf.
The files “Nationalities with number of registered persons in Düsseldorf” contain the following column information:
Nationality: Name of the State in short form
Key: three-digit country key/nationality key
Main apartment/single apartment: Number of citizens with main residence in Düsseldorf
Adjoining apartment: Number of citizens with secondary housing in Düsseldorf
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