Original: The aggregate income distribution is highly concentrated towards the top, with the top 6.37% earning roughly one third of all income, and those with upper-middle incomes control a large, though declining, share of the total earned income.
Simplified: While the aggregate income distribution tends to tilt towards the top with the top 6.37% earning roughly one third of all income, those with upper-middle incomes also controlled a large, though declining, share of the total earned income.