Originally Posted By: sinij
Top 10% isn't defined as 109K, it happens to be that number.
In order to make the assertions you're making you need to be able to tell us what that cut-off number was in 1982, adjusted for inflation. If it was lower then your argument seems to make some sense, but if it was higher then Derid's argument is more correct. Either way the number of assertions you can reasonably make from this one graph are very few and very general.

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