I honestly doubt that every 10th user in Norway is using Linux.
I assume data comes from statcounter.com. I looked at Norway there.
Browser market share: Firefox June 2023: 2.65%. September 2023: 36.27%!!! December 2.46%.
This does not compute. Similarly for Desktop OS. Linux in Norway has 3.41% is September, but 16.99% in November?
It does not explain Month to Month swings between 3.4% and 16%.