1.5% is a human term. We have example of "Time, Times and half a time".
That would make:
1 time = 1.5
times = 3
1/2 time = .75
This comes out to an 5.25% growth a year, but remember that a thousand years to Jehovah is but a day.
That would put the "divine growth" at 5250%!!!
Surely, a rocking of the nations worthy of our God.
Hahaha. That is some inspired math there.