sentences:  CBO reported that for the 1979-2016 period, after-tax income (adjusted for inflation) of households in the top 1 percent of earners grew by 226%, compared to 65% for the 81st to 90th percentile, 47% for the 20th to 80th percentile, and 85% for the bottom fifth.The income growth for the top 1% was less than the 1979-2007 increase, while the bottom fifth was much higher, indicating a reduction in inequality from 2007–2016.The bottom quintile benefited from Medicaid expansion and refundable tax credits.