If U.S. is "93% American" then on average 7 out 100 people you meet will not be "American", whereas for Japan only 2 out of 100 will not be "Japanese" - based on those numbers Japan is about "350% more homogeneous" country, not "5%" as suggested.
It is a case of Potato Paradox, where small numerical differences between values given as percentages can hide big differences in real world.
That's not a real paradox, which is why Quine called it a "veridical paradox." You're just taking your personal feeling about a difference as the primary criterion for evaluating the subjective significance of the difference, but these feelings differ from person to person.
If U.S. is "93% American" then on average 7 out 100 people you meet will not be "American", whereas for Japan only 2 out of 100 will not be "Japanese" - based on those numbers Japan is about "350% more homogeneous" country, not "5%" as suggested.
It is a case of Potato Paradox, where small numerical differences between values given as percentages can hide big differences in real world.
https://en.wikipedia.org/wiki/Potato_paradox