Pretty funny that coming from a Norwegian because they still have the flag out many places in my opinion :)
It's actually one of the things that stuck out the most after I had moved there.
Especially at "hytter" (vacation cabins) I think the majority has a flag out.
Same for national day, you'll see a bunch of flags.
Compare that to Belgium, where I'm from. Even on national day it's a rare sight to see a flag.
And it's only very fanatic people that will actually wave it around on the street.
The moment you'll see most flags out is probably during the world cup.