Circulating supply was 834 mil at the beginning of buybacks according to my buyback stats page.
Currently, supply is 1630 mil. I’m not sure what is circulating (and don’t bother to care).
(1630-834)/834 = 95% inflaion
This is using the moment when supply was greatest. If we compare to any time previous the inflation will be more because less nsr was minted at that time. Comparing to any time after (but still before pheonix hit the scene) the inflation would also be more because of buybacks. So 95% is actually a lower bound.