In the years since then, the number of these partakers has progressively decreased, principally because faithful Witnesses of Jehovah finished their earthly life course in death.
Hmm. Let's see if the 'discreet virgin class', namely, me, can enlighten us with some deeper understanding regarding this truth:
In the years since then, the number of these partakers has progressively increased, principally because faithful Witnesses of Jehovah finished their earthly life course in death, and Jehovah has evidently seen fit to choose additional humble individuals, who "keep following the Lamb wherever he goes". He has done this so as to ensure that there will always be some faithful anointed men who qualify to take the lead as members of the Governing Body.
Or:
Previously, it was thought that the number of Memorial partakers would decrease as the years remaining before Armageddon continued to pass. However, it became evident that Jehovah had not concluded his sealing of the 144,000. Since there remains yet more time before Armageddon, Jehovah has been able to complete this valuable choosing work according to his own purposes. Are we not grateful that he has allowed such anointed ones to be chosen from amongst his people today?
--sd-7