Right now, there is an imposed similarity between between '29, '87, and '08, in the OP's post. If you subscribe to the similarities (which the OP did not even endorse??), the implication is clear. "YMMV."
The last time I looked at The Great Depression in depth, what got glued into my brain was that there was not *one* drop, but 3 -- being '29, a near-recovery, then '30, and then '31. Things basically stayed flat until the early build-up to WWII ('37'38'39, when IBM and Remington stopped making sewing machines and type-writers, and started making M1 Garands and Mosin-Nagants (for the damn Ruskies...! Big money collectors' items now.)..And ships out the Wazoo...
Ooops: the point is, that the OP's graph (for 'journalistic purposes'...) does not show the end of The Depression. Does that make the graph any less interesting?
No.