AARP Hearing Center
I am unable to discern what point you are trying to make, @PedanticCurmudgeon . I also do not understand your charts whatsoever. You seem to be posting these charts every couple of months, but to what end. If your readers can not understand what your charts are showing and what point you are try to make, then further explanation is necessary.
I am unable to create a polite response to you, @nctarheel. And I see that others have chosen to not try.
Perhaps the final one, covering the 12 months now under preparation, will be clear to you.