Late 1991, but yep, that’s when inequality skyrocketed, as it was illegally disbanded and the former state sliced up and sold for parts to the highest bidder against the wishes of the public at large, causing roughly 7 million deaths.

I’m assuming you’ll actually answer now that the full source is linked, correct? Or are you just incapable of facing reality?

I’m usually quite particular about labelling axes, but this graph has both axes partially labled, and while the dates are easily inferred, the meaning of the left axis is in the footer, as is the general explanation.