I wouldn't be so worried about it. It's really hard for something as big as this to really hit 100%. If we hit 80% or thereabouts, we can at least plausibly argue to backwards ISPs that IPv6 is the default and the standard that everyone should reasonably be offering.

Generally: I'm really surprised that Norway is just at 27%. I think I've been with 3 different residential ISPs the last 15 years, and all of them have done IPv6 perfectly well (two nits: I think one required a trivial opt-in, and my current ISP is just giving me /60 which isn't perfect).

Edit: Oops, sorry to my current ISP for shaming them. Some googling told me that one can get a /56 using DHCPv6-PD. I'll try that!