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 controlling a large , though declining , share of the total earned income .
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 .