Just comments on other people's posts.
Data-dog: yes the charts confirm what many have suspected. But it is nice to have that confirmation. Even though this is just for Australia, the trend is probably equally applicable to Western Europe and North America and a few other places. On a previous thread, I mentioned that trends revealed by the Pew Report (2014) for USA seem to mirror the Aust data.
Steve2: That is quite a decrease. It took a year for the census data to come out in Aust. I will try to give you a hand analyzing the NZ data when released, if you want.
SBF: Mode in 2006 was a 45 to 49 yo woman. Mode in 2011 was a 50 to 54 yo woman. Mode in 2016 was a 55 to 59 yo woman. I didn't notice that before you mentioned it.
Yes I don't mention any emigration figure. There is no easy way to extract that. I have worked out a way of getting a fairly accurate estimate, but it is time consuming. I haven't done it as yet, as I don't think it will change the numbers much, and I don't know if many people will understand it, anyway.
You might be right about the SDA's not being a useful comparison. I will compare the Mormons, when I get the chance. I think there will be too few Baptists, and the Methodists merged with the Presbyterians and another one (can't remember at the moment) decades ago in Aust to form the Uniting Church, which is shrinking dramatically.
I originally thought about excluding females under 15 from the section 3 chart. I decided to do it the way I did, because it makes the point better (inevitable future JW decline), and is less open to debate.
LongHairGal: Yes, it will be interesting to see how many in the 5 to 9, and 10 to 14 cohorts remain. As I said earlier, their parents filled in the census form, not them.