It's a very strange price point - "Utility Coffee" like Dunkin or Tim's is usually around $2 for a medium, but "Specialty Coffee" like Starbucks or local cafes is $5 to $8. I'm not sure where they got their data, or what they qualified as "coffee" for this. The omission of the UK in their data is also quite strange.

I suspect based on the graphics that they're orienting this more towards the "specialty coffee" subtype, and getting this information from a supplier network rather than any sort of broad data "census".

Luxembourg with an average (!) of over 5 cups a day per person also seems extremely high. That’s over 10 cups of coffee a day for every person that doesn’t drink coffee over there.

Also, seems like different types of coffee have different amounts of caffeine, which I would say is important.

That would average to a Starbucks “Tall” each day, costing $6.

The volume seems plausible. The cost seems a bit steep.