it's been going down for years. i remember that we had to remove a few lines of seats, so the hall would not look all that empty.i also know that many (i used to do that too) don't go into field service but turn in some 2-4 hours every month.
It's the same here in northern germany. Congs that have been separated in the late 80s/early 90s are merging again, lines of seats being removed (to have more space for the families with kids, of course. Not because it looks so depressing empty in the halls). Many (I also did that)counterfeiting their field service reports...
It's going down...