The top quintile had 51.2% of aggregate income in 2014, or 2.56 times their share. But things rapidly get worse as you go up from there: the top 5% alone had 21

The top quintile had 51.2% of aggregate income in 2014, or 2.56 times their share. But things rapidly get worse as you go up from there: the top 5% alone had 21.9% of aggregate income in 2014, or 4.38 times their share. My source for the top 10% having 49.9% of aggregate income in 2014 was Figure 9 of Saez, Emmanuel. "Striking it Richer: The Evolution of Top Incomes in the United States", on page 9 of the PDF linked below. https://eml.berkeley.edu/~saez/saez-UStopincomes-2014.pdf https://eml.berkeley.edu/~saez/saez-UStopincomes-2014.pdf