Originally Posted by
König
Did you notice that the high rate of refusals for B-type visas (B-1 and B-2) are from the countries that generally have visa-free agreement with the USA? The citizens of those countries should not even be required to apply for a B visa... unless they either have some criminal history or negative encounters with the US immigration officials in the past. That is why the rate is so high.
This seems the most plausible explanation.
Although it's true that citizens of the visa-waiver countries would need to apply for a B-type visa in some circumstances (e.g. a planned stay of more than 3 months, arrival by private plane), nevertheless most would not, and I suspect that people with some "immigration problem" (for want of a better term) account for the high rates of refusal from these countries.
As for a country like Andorra, it is so small in population (and, moreover, on the visa-waiver list) that the number of applicants for a B-type visa is likely to be tiny.
Ultimately, it's hard to make any real sense of the list without knowing the number of total applicants from each country and (in the case of the visa-waiver countries) the reasons for the applications being needed.
Nevertheless, it's interesting...