[ZoeZoeBee]

Can't speak for wikipedia or those who make the edits, frankly the only reason I responded to you is I know you're confused and so is dragonwriter.

Feel free to take a gander at the Census Bureaus reporting of Personal Income. Table 1 Page 7. https://www.census.gov/prod/2009pubs/p60-236.pdf

Do they use Median or Mean? $27,834

Edit Dragonwriter, You don't understand the difference between Mean and Median Income, hint its not what you think it is

[dragonwriter]

The first part of Table 1, on page six, reports medians. The per capita section, which is at the top of page 7, reports means (though it retains the median heading, which is admittedly poor data presentation.)

You have to read the footnotes.