Понятия не имею. Погуглите и найдите. Наверняка в российской википедии будет. Вот тут хорошо написано https://www.theglobalist.com/is-there-a-russian-middle-class/особенно вот это:Unfortunately, from a purely economic point of view, Russian society today more strongly resembles Brazilian society than that of the United States. In both Brazil and Russia, a very few own a lot — and many own nothing at all.