I'll start the sound off:
It's clear that nobody has taken your question seriously, but that's not surprising. There are too many factors involved.
For instance, and I'm not alone in admitting this, I'm a schizophrenic. So Good Didge and Bad Didge (check my halo and horns) are both here, but should I be counted as one person or two? And what about all the other schizophrenics?
Or those suffering from multiple personality disorder? How would you count those?
Then we have to factor in the Spiritualists who may bring their spirit guides with them, and the Christians who may be moved by the Holy Spirit. And if it's the same Spirit for all Christians would it be counted as one presence, or one each per person?
I suppose the best way to answer your question is to say there are googols (no, I didn't mean Googles) of members but we're a pretty friendly lot.
Well, my awesomness could be counted as 100 people!
Ten thousand bottles of beer on the wall take one down pass it around
Another one! Me!