It is the rolling, 20-year mean; a lot easier to see the fraud than the yearly one. I am sure you are correct. I will post the yearly one shortly.
You know yer stuff!
The previous graph that I posted showed a rolling, 20-year mean, with the charts overlaid. This is the yearly ones; not as easy to see, but trend is the same.
Top one is the bogus one, bottom is the corrected one.