It is official statistics.
If you mean alternative things, it is from "independent sources" (as written by authors of this charts).
If you dig into previous posts, you could find similar charts and reasons behind such data.
It's ok. People are retiring earlier to spend more time on their yacht, so less participating in the workforce.
Is shadowstats the source for the alternative?
....sources?
This charts remaind me of another good quote:
A man attempting to walk around the world... drowned today
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