This means that 44 percent of all households in 2017 had incomes that were earned only by the top quintile fifty years before. In 2017, 58 percent of the middle quintile had earnings that were in the fourth quintile in 1967. More than a third of second-quintile households in 2017 earned what middle-quintile households earned in 1967. Although 77 percent of the bottom quintile in 2017 still earned at the bottom-quintile rate for 1967, that still means that 23 percent of those
