Perspective From an Oldie:
I think the preceived decline may be relevant to when you woke up and came out. Here's how it seems from my memory:
1966 - Release of the book Life Everlasting in Freedom of the Sons of God book pinpointed 1975 as ending 6000 years of human existence on Earth, which was expected to begin the final "thousand years" of a 7000-years "creative day."
JWs jumped on this with almost unprecedented enthusiasm for the ministry and resulted in a surge of converts between 1966 through 1975 as well as significant profit for the WTS.
BEGINNINGS OF DECLINE FROM 1975 ON:
1975-1977 - Significant falling away following 1975.
WT president Nathan Knorr died in summer of 1977 and was succeeded by VP Frederick Franz. Frederick Franz had a grudge against his nephew Raymond for his involvement in legalizing the WTS Governing Body in 1975, which had until then served prettry much as a figurative body. The move essentially wrested sole authority away from the WT president and VP.
1977 is also the year a treatise from Swedish loyal JW, Carl Olof Jonsson, arrived at Brooklyn HQ that exposed the Society's flawed chronology for Jerusalem's fall to Babylon in 607BC, which of course discredited 1914 as the parousia of Christ, and therefore his appointment of the Bible Students as the "Faithful and Discreet Slave" who "witnessed" the [non]event.
1977-1982
CO Jonsson disfellowshipped.
Witch hunts, trials and "cleansing" at WT Brooklyn headquarters.
Fred Franz claiming that the decline following 1975 was due to Jehovah's discipline for "apostasy" in leadership at Brooklyn headquarters.
1982
Raymond Franz disfellowshipped.
Disassociated JWs shunned the same as disfellowed.
The word "apostate" comes to the fore of JW speak.
(Probably in their hindsight, DFing Raymond Franz was the biggest 'mistake' the WTS ever made.)
In the shakeup, other disillusioned Bethelites leave Brooklyn and join association with those disfellowshipped.
A first gathering of former Jehovah's Witnesses at Peter Gregerson's home in Alabama.
BRCI (Biblical Research & Commentary International) is formed.
In those days, Jehovah's Witnesses enjoyed far more national public awareness due much to media coverage of their national and international 8-day conventions in New York and elsewhere. Ray Franz's expulsion made national news, and thus many former JWs for the first time had a focal to contact, which thereafter resulted in many coming into contact with BRCI.
1983: CRISIS OF CONSCIENCE published. Commentary Press, Inc. formed.
1985: Apocalypse Delayed published by M. James Penton.
1987: Gentile Times Reconsidered by CO Jonsson published by Commentary Press exposing the WTS's flawed chronology and 1914 date.
Annual BRCI gatherings became conferences held around the country from Georgia to California and Florida. This provided the premier support for people who left the Watchtower religion. Former Jehovah's Witnesses now had a cohesive fellowship that soon became an unprecedented international association.
1990-1996
Onset of JWs communicating with apostate JWs in "news group" communications via the fledgling WorldWideWeb.
For the first time, JWs could converse with exJWs anonymously.
Four prominent dissident JW Web Sites emerged on the Internet publicly exposing the WT as never before.
Full expose's of Watchtowerdom could now be searched and seen by anyone who ventured into the Internet world (less than 2% of the U.S. at the time).
An e-mail list group called Jesus' Witnesses was advertised and covertly joined by prominent exJWs and JWs alike. It was the premier Internet communication among exWitnesses at the time.
1996-2000
H2O (Hourglass 2 Outpost)--the forerunner of this Website--was launched, creating a public expose' of the Watchtower religion by dissident former JWs, sending shockwaves to the Watchtower religion as never before nor since. It was heavily monitored by WT HQ and even Brooklin heavies joined discussions once in a while to try to desuade the negative influence. The slightest slip of inside WT information could result in immediate action against Bethels internationally. The "secret Elder's Manual" was published on Internet.
Most of the prominent names of well-known exJWs then have moved on, with very few old-timers left in the exJW forums now. But their pioneering efforts launched the tidal wave of dissent that is swelling for the imminent fall now. I would not be surprised if follows the way of the Worldwide Church of God (Armstrong) before the next decade. (They were considered somewhat in competition with the Watchtower in their hayday.)
Bottom Line:
I think the failed 1975 prediction with Knorr's death (77) was the beginning of the decline of the Watchtower. It does not even seem like the same religion it was before then. Most of the JW growth since '75 has been predominently due to baptizing their own children as they grew to age rather than canvassing for converts. The disfellowshipping of Ray Franz, COJ's expose' of their cruicial chronology, Penton's expose' of the WT history, BRCI, and H2O all played a heavy role in the beginnings of what has snowballed into their escalating decline today. I predict it will suffer another significant blow after 2014 when they pass 100 years after 1914. Most JWs cannot even tell you what the WT "good news" is today. Obviously not what it was before the 1914 generation ran out in 1996.
~Binadub