This is how it works in Denmark. A letter costs 23DKK ($3.44) within this small country. A fast letter is 36DKK ($5.39).

I think I've received two letters in the last year. I haven't received any individual junk mail letters.

The letter volume last year was 90M for 6M people, so about 15 each. I assume elderly people and others who have opted out of receiving government and business mail digitally drive that number up.

(Someone still delivers a bundle of leaflets from local businesses all together every month or so, and a local newspaper, but I don't think it's the postal service. Every home gets the same bundle.)