[TonyR]

[I]n 1970, the middle class held 62 percent of the income in the country. The upper income held 29 percent. Those numbers have now flipped: The middle class is at 45 percent and the upper income class is at 46 percent.

http://www.npr.org/blogs/thetwo-way/...-and-shrinking

http://www.pewsocialtrends.org/2012/...-middle-class/