The list is obviously going to be dominated by countries that are somewhat fucked up.
In countries where people routinely face adversity they make extra effort to help each other. It's an effective strategy, since people tend to reciprocate.
In wealthier countries people don't expect to need other people's assistance as much so they invest less in building up favors in case of adversity.
By that logic, you've persuaded me yet again, that the US is more than "somewhat fucked up", listed right after the failed state they invaded, destroyed and abandoned to radical terrorists and the pseudo-state they set up to dump their ex-slaves and abandon them to disease, poverty and anarchy on a continent they'd never known. But wait, d'ya s'pose even a single one of the 1% of Americans was ever asked for help in this survey? A fair percentage of the 99% in that country —the angry, jobless Trumpies as just one f'rinstance — might well fit your criterion of "routinely facing adversity".
Anyway, it confirms my experience that individual Americans are as generous, helpful and well-intentioned as anybody I could imagine.