Share of aggregated U.S. income 1970-2014, by income tier

This statistic shows the share of aggregated income held by U.S. households from 1970 to 2014, by income tier. In 2014, the middle class held merely 43 percent of the aggregated income of all U.S. households.
This study defined middle class income households as those with an income between 67 and 200 percent of the U.S. median household income, after adjustment for household size. In 2014, the middle class income ranged from about 42,000 U.S. dollars to about 126,000 U.S. dollars per year for a three-person household.