Nationalities of the Düsseldorf population

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