For the record, you are both right.
Nemesis is talking about percentage changes in attendances versus percentage changes in population. He's correct that the growth in crowds do not match population changes. Also, its worth considering in 1994 teams such as the Warriors, North Queensland, Melbourne Storm, did not even exist. Unbelievably, during that interim period Adelaide Rams, Western Reds, North Sydney Bears, Hunter Mariners, South Queensland Crushers have all fallen by the way side, South Sydney and Gold Coast have been, gone and come back, Illawarra and St George have lost their seperate identities as has Western Suburbs Magpies and Balmain Tigers. We had the bitter war in that period too. All in all, it's been an era with much revolution and there is a lot of problems that have arisen from it. Some will have long term advantages strategically, such as the Warriors, Cowboys and Storm opening up new advertising sub markets for sponsors to put their money into the NRL for.
ElectricEelMan is talking about nominal percentage changes in attendances. This is also correct. It doesn't take into consideration though the change in population.
However, change in population also does not take into consideration change in demographic trends. A large reason for Australia's population boom is due to globalisation and the ensuing immigration of either people looking for a better life or labour's demand for qualified specialists. Most of these people who come to Australia probably have not heard a lot about rugby league before they arrive here. Also, when they come to Australia, even if they are sports motivated, there are now an abundance of different options for them to spend their money on - as sad as it sounds, AFL is nationalised, the A-League has set up well geographically if not in a sparse manner, 20/20 cricket is pouring ticket money into cricket while test cricket in particular still stays very strong in Australia, rugby union since 1994 has expanded and become more professional with the advent of Super 12/14 and the SANZAR Tri-Nations, etc. So one should not expect a 23% increase correlating over this period. Without referring to figures, aside from start up competitions or complete overhauls of competitions, I doubt 23% increases have been felt across the codes.
The other massive aspect since 1994 to 2008 and now 2009 is the improvement of media broadcasts. Nowadays, you can watch 5 or so games live in the comfort of your own home. I would suggest trends would show a stark increase in non-free TV subscriptions and it would probably be with some trade off to attending games.
Overall, while ticket numbers are useful, the main thing to take into consideration for the health of the game is actual real dollars spent. Not only on tickets, but also the media contracts, advertising, merchandise et al in contrast to the increase in cost expenditure over this period. We need to analyse player participation across the levels, and also we need to look at the long term impact of the state government reforms on pokie tax to understand their impact on various clubs who are heavily reliant on these revenue streams. Put simply, pure crowd numbers only give half the picture of where the game is at.