The “growth” percentage presented appears to be baptisms exprsssed as a percentage of those in attendance at the convention, which is a peculiar way to calculate “growth” to say the least.
Since when was attendance at a convention the measure of JW membership?
What about people who died or became inactive?
Why are only baptisms from the summer convention counted and not the two assemblies?
Not to mention unbaptised publishers, and other issues.
I don’t think this “growth” figure tells us anything much at all. A comparison with last years’ attendance and baptism figures at those conventions would be useful information.