We have been in free fall since the late 70's. The decline didn't start with Obama, but he sure is trying to make it worse.
Global wage arbitrage, immigration, trade policies, globalization, debt spending, more government...etc..
Looking back, we will see that a middle class was a oddity in history. The polices of the GOP and the Dems will not solve our current problems...They have been at the root of it.
I have those years for all the columns though of course some types of data do not go back that far. I hesitate to post them all at once owing to the size -- and possible damage to scrolling wheels trying to ignore the posting. :)
Any suggestions for additional important data would be appreciated. If I can find it among federal government sources I'll add it. Thanks.