Density may play a role, but Norway, Denmark and Finland have urbanization rates of 83% to 88%. E.g. a fifth of Norway's entire population resides within the Os

Density may play a role, but Norway, Denmark and Finland have urbanization rates of 83% to 88%. E.g. a fifth of Norway's entire population resides within the Oslo metropolitan area and a fifth of Sweden's population resides within the Stockholm metropolitan area.