In terms of electricity production it's more like 88% currently[1], along with a total reservoir capacity of 70% of annual production.

[1]: https://energifaktanorge.no/en/norsk-energiforsyning/kraftpr...

> Don't forget hydro, I think it's 40+% of production in Norway.

Hydro is the first row in the table at [1], so it's 84% by capacity (second column) or 87% by typical annual production (third column).

[1] The Norwegian Water Resources and Energy Directorate: https://www.nve.no/energi/energisystem/kraftproduksjon/

Sorry I actually meant hydro, not geothermal!

More like 95+%