Nothing too surprising here. Yes the average has slipped under the 2005 level but that's not a surprise and, based on historical figures for the various home fixtures, it will be a challenge to keep up with 2005's late season increase.
Just on that- next round (20) should be the lowest for the rest of the season, with a flat 14k average unless there's a blowout in the Penrith/Wests derby, with the next lowest being round 22 which looks like getting high 14ks for its average (although Bulldogs vs Cowboys @ Lang could kill off that round completely- based on history they'd get 25k, I very much doubt they'll get that many punters there).
Beyond those two rounds there should be very consistent 15-16ks with round 24 the breakout at about 18.6k if everything happens like it has in the past, and the normal ramp up that could lead to bigger crowds for the last few rounds of the season. If everything does follow that script it will be hard to beat 2005's average, but still possible. At the end of the season we could be looking at beating it by a few hundred maybe and that's if the build up to the finals is consistantly big. A few major surprises and you never know- we may just nail it.
The total-tickets-sold record however is well within grasp. 8 games behind and we're only 40k tickets behind which should see us get over the top of 2007's record but not by a whole heap. Again, if the finals build up kicks in we could blitz it but that's a fairly decent 'if'.
Then again, I am using conservative figures so who knows ;-)