A quick addition to mention that this first article has at least one big inaccuracy, and should be approached with caution. Australia is not 83% Christian, nor is the breakdown "(Roman Catholic 78%, Protestant 5%)" even remotely accurate. In fact, a quick look at the https://www.cia.gov/library/publications/the-world-factbook/geos/as.html quoted as the source shows very different figures. Approximately one-third of all Australians are descended from Irish immigrants, most of whom were forced migrants sent to Australia in the early 18th century during religious and political protests and attempts by the Irish to reclaim home rule; even if all of these Australians retained their Irish Catholic identity, along with the smaller proportion of Italian-Australians from Catholic backgrounds - it would still be surprising if they had convinced another third of the country to convert to their beliefs. Just a reminder to check figures you see online, and carefully follow up on the source used.