Right, I'm back from the Australian Bureau of Statistics website, where I've spent minutes in exhaustive research...

Australia currently has a population of somewhere between 19.75 million and 20 million - my estimates obviously date from my High School geography class : )
Anyway, comparing the stats in the 'religious affiliation' section of the 1996 census, the Jedis having 70.000+ members brings them to having a similar percentage of the population as the Salvation Army... Is there a link? Think about it... lightsabres - tambourines, cool robes - little hats. I'm onto something here, aren't I?