Observations from the chart. U3 (official) and U6 have kept in synch; both doubled and tapering downward.
The SGS trend however is different. It did not double and is trending upward with no end in sight. So the SGS does not as bad a hit as U3 and U6 but in another year it may.
Thanks for the graph! I like John Williams, I’ve seen some of his videos, and think he’s got a good grasp on things.