Final answer:
The top quintile of the U.S population has seen the greatest change in income over the last generation.
Step-by-step explanation:
The top quintile of the U.S population has seen the greatest change in income over the last generation.
In 2020, the top quintile of the income distribution received 52.2% of income, which is the highest share compared to other quintiles.
This implies that the highest-earning 20% of households in the U.S have experienced the greatest increase in income over the past generation.