Interesting question, Slimboyfat.
I think all you could do is conduct an informal survey like this. I served as an elder for about 20 years. Although I did not keep a log, I have previously estimated that during that time I was on 40 - 50 judicial committees (JCs).
The result was generally private reproof. Public reproof and DFing were the minority
My recollection is that that there were less public reproof than anything as that would only be the case where the person was "judged" repentant, but whatever "sin" they committed was well enough known that we felt that it needed to be announced to the congregation so they knew we (the elders) had "handled it." It's all about appearances, as I'm sure you know.
There were often JC's happening which I was not involved with. My recollection is that I served on roughly half of them. Of course I'd have no way of knowing if the congregation I was in was typical or not.
To put some rough numbers to your categories:
a) disfellowshipping - 25%
b) public reproof - 5%
c) private reproof - 69%
d) no action - 1%
I can only recall two situations that resulted in "no action." The only way that would happen was:
1) the individual was unavailable and/or refused to meet with us and we did not have sufficient "evidence" to DF them in absentia, or
2) the individual denied the accusation and there was only one "witness" against them. (No it wasn't a pedophilia case. I never served on a JC involving allegations of that.)
If enough current/ex-elders comment on this thread, you may be able to estimate the number of JCs each year.
Paul Grundy has this statement on his jwfacts.com website:
For every 100 Jehovah's Witnesses more than 1 is disfellowshipped each year; over 70,000. (1) Two out of every three are never reinstated. (2)
- - - - - - - - - -
1 - "In recent years disfellowshippings worldwide have been approximately 1 percent of publishers." Watchtower 1992 Jul 1 p.19
2 - Statistics provided in Watchtower 1974 Aug 1 p. 466 and Watchtower 1960 Dec 1 p.728 indicate that roughly only 1/3 return.