And remember that this doesn't take into account unemployment, which makes the situation worse.
Oups, you forgot the last 10 years (on your chart).
Here is what it should look like:
Note that median household income has been on the rise. But that rise starts at about the time in Obama's administration that saw the long-awaited rebound in the economy in 2014 (when we see an uptick in the median household income).
And whyzat? It was inevitable that it would take so long. Economic history since the outset of the Great Recession:
*Obama stopped the Great Recession explosion of unemployment-rates in 2008, his first year in office. The Great Recession (2008/10) was Dubya's gift to Obama's presidency.
*Obama's bill (ARRA, passed with a Dem HofR in early 2008) spent $875M to restart the economy. It's effort was to stop-dead the exploding unemployment rate,
which had been at 10%! (See
here.)
*But when Americans foolishly gave the HofR over to the Replicants (2010), Obama wanted more stimulus spending; which he was refused by the Replicants. Do you remember the Replicant hogwash at the time about "the infernal spiral of the America's humongous debt"?
[That was their "excuse" for saying no to more spending in an economy still suffering from 6.5% unemployment!!!
*But why the "excuse"?
Because the Replicants WANTED high unemployment to help win the PotUS election in 2012!
*
Whereupon there was no further stimulus-spending beyond 2010, and the economy was left to recover all by itself. See the employment-to-population ratio chart
here, and note that the ratio effectively finally goes-north around 2014.
And, finally:
*The consequence was that, after such a long recession, the next Replicant candidate had a good chance at the presidency despite the fact that the Replicants themselves had refused any spending that would have shortened the low-employment timeline!
*Which is how Donald Dork lost the popular-vote election, but won the presidency. (Also yet another bizarre tale in a long list of America's recent political and economic history!)