3. Review the most recent Census data on the US income distribution. Quintile (Group Share of Aggregate Mean Income, Share of Aggregate Mean Income, 2018 of Households) Income,1980 1980 Income, 2018 Poorest 20% 4.2% $12.540 3.1% $13.775 Second 20% 10.2% $31.210 8.3% $37.293 Middle 20% 16.8% $51.501 14.1% $63,572 Fourth 20% 24.7% $75.874 22.6% $101.570 Richest 20% 44.1% $135,284 52.0% $233,895 * Top 5% 16.5% $202.165 23.1% $416.520