Lots of people are outside of the US

The spirit of the drawing applies everywhere. This 10000 figure looks made up anyway.

(hi from outside US :-))

The Hitchhiker's Guide to the Galaxy is British.

Also, I know it, it has been translated in my language (French), the movie made out to the theaters, and we even have a well known school named after it (42). So it is known even to non-English speakers.