Chaos golem of maelstorm how many wither stacks does it currently apply with its aura?

Does anybody know how many stacks of wither it can generate currently since it gets buffed in the patch notes. Is there any way to currently know the amount of wither on an enemy? In poe 2 they solved this but in poe 1 im not so sure?

Poe db doesn't seem to help much either. I was hoping to find a stat like 4 withers applied per second while in the aura.