I agree Alan, it would be depressing for the bros to clinically observe the diminishing numbers of publishers and it would accelerate the decline so they must change their tactics.
They would of course spin numbers decline by dredging up a scripture to show that it only proves that Big A is just around the corner.
So I expect the yearbook to change its role in future, no figures just feel-good experiences for the faithful.
Nothing they say ever has any critical meaning, it's all spin and waffle however and wherever they present it.