I remember it from the early 80's.
Mid 80's they simplified it into two different announcements: one for disfellowshippings and a different one for disassociations.
Then, in the 90's, it was just one announcement. "So-and-so are no longer a Jehovah's Witness."
As recently as 2015 (the last year I attended), they would still give a talk during that month's local needs section related to the particular sin.
I vividly remember at least three of the local needs parts given in months where I was already aware of what someone was being disciplined for. Apostasy, Wife Swapping, Adultery.