"In 1979 the middle three household income quintiles in the United States—that
is, the population between the 21st and 80th percentiles on the income scale—
earned 50 percent of all national income. But by 2007 the income share of those
in the middle shrank to just 43 percent"
well its not 40 ....yet but its dropped 7 points
almost a 15 % drop
in share in less then 30 years
about .25 points per year
--------------------
Between 1979 and 2007 median family income rose
by 35 percent,
while incomes for those at the 99th percentile rose
by 278 percent-------------------------------
btw
i think a personal income in the middle 60 over say ten years
that is a middle income soul
not consistently in the top or bottom 20
now if this is cohorted
then we get another refinement
as we look at the age profile of the middle 60
