家庭收入在当地Top15%，就是当地的上中产。中西部多数地方上中产家庭收入门槛可能二十万，加州湾区上中产门槛至少三十多万

"Sociologists Dennis Gilbert, William Thompson and Joseph Hickey estimate the upper middle class to constitute roughly 15% of the population."

https://en.wikipedia.org/wiki/Upper_middle_class