In June issue of 'Rugby League Review' out today, has the following crowd stats (page 9) -
CROWDS
In Sydney: 689,404 (39 matches)
Average in Sydney: 17,677
Outside of Sydney: 743,658 (42 matches)
Average Outside of Sydney: 17,706
Overall crowds: 1,433,062
Average per game: 17,692
I am assuming that the Wollongong and Gosford games are counted as 'Outside of Sydney' (which they are) but I'm not 100% sure of that.
The above counts all games up to last weekend round 12 except for last night's Gold Coast vs Roosters game as I'm guessing it was too late to make it to print.
If the Gold Coast vs Roosters game is added it makes 'Outside of Sydney' and 'Overall crowds' stats as follows:
Outside of Sydney: 756,893 (43 matches)
Average Outside of Sydney: 17,602
Overall crowds: 1,446,297 (82 matches)
Average per game: 17,638