I'm surprised only 8%. My memory of growing up in the UK in the early 80's was that ZX81'S and ZX Spectrums were super common. I bought my ZX81 in 1982 for £50 new which looks like it was maybe $80.
One of the reasons the Spectrum was so common was the low price. And of course using taps for games meant that most weren't paid for, but copied and shared around at school.
I grew up with the ZX Spectrum, like so many others, and it is what started me programming/developing/being interested in computers.
The UK actually had the highest level of computer ownership in the world at around that point.
You're probably looking at it from a biased point of view though. When I was growing up everyone had a Snes. Of course it was just all teenage boys that had one.