I am the official currency of a nation known for its fjords, Vikings, and high quality of life. My value fluctuates based on global oil prices, as the nation is a significant oil exporter. The Nobel Peace Prize is awarded annually in the capital city where I am used. You might use me to buy 'brunost', a distinctive caramelized cheese. The central bank that issues me is called Norges Bank.

1. My name sounds like a unit of measurement for thread or yarn.
2. The nation using me is not part of the Eurozone.
3. My symbol is 'kr'.
4. My name is related to a word for 'crown'.