iax2 show net stats how does it work?

asterisk -rx “iax2 show netstats” | grep x.x.x.


I have a bunch of packet loss and I am trying to figure it out its only happening for iax2 nothing else.

so how does the iax2 show netstat command work

why kpkts is zero across the board?
why the % column is all over 100%?

what are the numbers based on, the entire current call? or 1 minute averages or something?