I hope people notice the income is in HKD. $100,000 USD is more than most US citizens make, $100,000 HKD = ~12,887 USD, which is considered impoverished in most of the US. That having been said, in theory, most US respondents would be in the "top" income group of this survey.
I just realized, that I gave a wrong answer there. I didn't consider, that here in Austria we get our monthly pay 14 times(fixed bonus for summer and x-mas).It is better to ask for the yearly income.