slimboyfat:
I don’t know any religious group that defines membership as attendance.
I don’t know why you imagine this supports your position. 🤦♂️ The fact that many denominations actually count adherents rather than only regular attendees only further demonstrates why their reported growth rates are lower than those reported by JWs.
If xyz church has 100 adherents comprising 20 lapsed members and 80 regular attendees of whom 10 are young children, attendance would be reported as 80%. If 10 new people then join, their reported growth rate would be 12.5% if they count only attendees as members, but only 10% if they count all adherents as members.
If a JW congregation has 100 adherents comprising 20 'faders' and 80 regular attendees of whom 70 are regular publishers, attendance would be reported as 114%. If 10 new people then join, their reported growth rate would be 14.3%.
It is obvious that the JW method of counting ‘publishers’ inflates their reported growth rate.
I haven’t verified your assertion about census reported membership in New Zealand though this is an anomaly, not a trend. For example, in Australia from 2011 to 2016, JWs ‘rose’ from 0.4% to… 0.4% of the population, and then fell to 0.3% in 2021 according to official census data. But according to JW data they went from 0.266% of the population to 0.295% to 0.272% for the same years. The percentages for 2011 to 2021 well demonstrate that the JW-reported figures (increased) cannot reliably be directly compared to self-reported affiliation data (decreased).