Good grief, only 2% of American women keep their names when they marry! Here you have to justify a choice to take your husband’s name, it’s so rare. I couldn’t find the exact numbers at Statistics Norway but among the peope I know as many men have taken their wife’s surname as vice versa. And no, that’s not because a lot of men change their names, though unlike in the States, either way is easy enough. I guess a few women do add their husband’s name to their own, but even that’s seen as slightly off.
Of course, it’s entirely possibe that I just have strange (though loveable) friends.