Someone to explain how TRX is getting burned and what the rates are?

TRONTRON
$0.06822
1.86%
self.Tronix1m ago
It is clear that the TRC price is not longer related to BTC in any way. Now looking at the total circulation, i saw that around 5bil coins already got burned. I understand that USDD is related to this but I do not really understand how or how high the burn rate is. Could please someone give me a better understanding?