Vol 16, No 4 the skeptic p 63 
Australian Skeptics Science and Education Foundation Report
Per capita grants have been made to Australian Skeptics groups as follows:Which suggests the percentages of subscribers are:
NSW Skeptics Inc. (Including Hunter) $12,175.VIC Skeptics Inc. $10,950
QLD Skeptics. $3,575
ACT Skeptics. $6,725
SA Skeptics. $6,375
WA Skeptics. $1,375
TAS Skeptics. $725
If the "capitation amount" was $25 per subscriber,
there would have been 1676 total, 438 in NSW and 29 in TAS.
QLD's 143, WA's 55 and ACT's 269 are anomalous: they don't reflect population size.
It was later noted that QLD had a large increase in membership.
By population, you'd expect between SA and VIC, and WA at least the size of SA.