I am the official currency of a country known for its stunning fjords, Vikings, and Nobel Peace Prize. My value floats, but I am closely monitored by the central bank. Oil and gas exports significantly influence my strength, and I am sometimes called 'krone' in the plural form.

1. My symbol is 'kr'.
2. My value is often affected by fluctuations in global oil prices.
3. My country is not part of the Eurozone.
4. Famous for salmon exports.