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This statistic shows the U.S. employment rate from 1971 to 2015, by income tier. In 2015, about 66 percent of U.S. adult residents that were part of the middle class, were employed.
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. Middle class income ranges from about 42,000 U.S. dollars to about 126,000 U.S. dollars per year for a three-person household.