老美median 家庭收入大概$75K，老留中留多數是當地的上中產，大概top 15%家庭收入。

來源: 於 2023-09-20 16:32:00 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

"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