For the poll, how would you complete this sentence?
I would say that if you are in the top __% of household incomes in the United States, then by the standards of living in the United States you are rich.
If in trying to answer that you'd get caught up in local cost of living differences feel free to replace "United States" with whatever smaller jurisdiction would make you comfortable, such as:
I would say that if you are in the top __% of household incomes in the San Francisco Bay Area then by the standards of living in the Bay Area you are rich.
Don't get caught up on how much money that may actually be. Rich is a relative thing, I'm curious how far from the average one must be to be perceived as rich?