There are more of us than you think

Okay this is English but none the less i can't see why it wouldn't translate reasonably well to Australia.

In 1998 the stats were...

Regular church attenders 10% - Across the denominational spectrum, roughly 10 per cent of the population attend perhaps 5 ‑ 8 times in a two-month period.

Fringe attenders 10% - Roughly 10 per cent of the population may attend church 1-3 times in a two-month period.

Open de-churched 20% - Forty per cent of the population are 'de-churched'. At some point in their life they attended church. Of these, 20 per cent are the 'open de-churched'‑ people who have left church at some point, but are open to return if suitably contacted and invited.

Closed de-churched 20% - Twenty per cent of the population have attended church at some point in their life, but were damaged or disillusioned, and have no intention of returning.

Non-churched 40% - Forty per cent of the population nationally have never been to church, except perhaps for the funeral or wedding of a friend or relation.

So there you go - in the UK at least as many people who go to church are outside of the church but open to going back. The little summary says if "suitably contacted and invited" I doubt if that is all that is holding people back...

Source:
Philip Richter and Leslie Francis, Gone but not Forgotten (Darton, Longman & Todd, 1998). Taken from Church of England’s Mission and Public Affairs Council, Mission-shaped Church: Church Planting and Fresh Expressions of Church in a Changing Context (Church House Publishing, 2004) p 36.