I think it's interesting that nobody seems to know.  And I gather you agree with Mike that everything came to a screaming halt by the mid-90s, and even the "steady trickle" kind of dried up.  Why do you think that happened?

But I do recall almost nobody receiving knowledge from about 1977-1983 or so.  Very few.

BTW -- are the people who received knowledge int he 80s and 90s still around as premies?