...And 2nd in worldwide median income, which is half the real reason here. The other half is that Norway has very favorable tax treatment for electric cars vs not (which is at least mentioned in this article thankfully).
But being the 13th largest oil exporter seems like a very dim relation that's not really relevant, except as a cute thing. It's like saying "Wood houses popular in Granite-producing New Hampshire." "Ad blockers popular among ad producing community." etc
[note this was commentary on submission title chosen, which previously was the same as the article: "Electric cars grab almost half of sales in oil-producing Norway"]