If you happen to be in the UK - Graham's Dairy milk (sold in supermarkets) is 5%. But you're right that 'whole milk' is 3.5% or greater, typically 3.7% for supermarket own brand. Gold top or Jersey is 5%.
I'm in Germany. "Full fat" is 3,5%, sometimes premium milk has 3,8% and I think that's the highest I have seen.
When I was little, we had milk from a farm in the village and I sometimes went to fetch it.
In Finland they sell some small portion-bowls with a thin solidified cream layer on top. It's not yoghurt but something we Swedes call "Långfil" [1]. It has a very funny consistency, it doesn't stick to the spoon as normal youghurt and is very delicious!
