What do you mean when you say "scandinavians in Norway"? If "Scandinavia is a region that includes the three kingdoms of Denmark, Norway and Sweden" that doesn't make sense...
This is Statistics Norway's overview of immigrants by country of origin. So this means that people from Scandinavian, or rather Nordic, countries other than Norway (i.e. Denmark incl. the Faroes and Greenland, Sweden, Finland and Iceland). I can't find a more detailed breakdown right now.