Graph of the Day 2: NFL Regression—Descent Into Chaos

I guess it’s funky graph day here at SSA:
This one corresponds to the bubble-graphs in this post about regression to the mean before and after the introduction of the salary cap.  Each colored ball represents one of the 32 teams, with wins in year n on the x axis and wins in year n+1 on the y axis.  In case you don’t find the visual interesting enough in its own right, you’re supposed to notice that it gets crazier right around 1993.

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