The Telegraph reports that NRL Crowds are down over 12 years, supported by good data. Its worth noting that the figures for this year are down only 2% on last year. It should be noted that the fixture changes with several smaller games this year that were played at bigger venues last season.
Article here: http://www.news.com.au/sport/nrl/nrl-attendance-figures-have-alarmingly-slumped-to-their-lowest-level-in-12-years-in-the-opening-three-rounds-of-2015/story-fnp0lyn3-1227277020004