Answer:
The highest median income in purchasing power terms was in 1995, then 2005, 2015, and last 1985
Explanation:
To solve this question we must transform the median household income into comparable units. To do so we use the CPI data given in the problem.
We can arrange everything in a spreadsheet like the attached figure. In column A we have the years, in B the nominal median household income, in the third the CPI divided by 100, this will allow us to deflate and calculate the median income in constant 1982-1984 us dollars (since 1982-1984 will be the numeraire at 1). We do that by dividing column B by C, which is shown in column D.
With these values then we have all the median incomes in comparable units. We now can order and compare them
