I just take the supply measurements from steemdb.io at two different times and figure out the rate of change. i.e.
( Supply_at_time_1 - Supply_at_time_2 ) / (time_1 - time_2)
Burned tokens, rewards, and inflation summary March 4, 2023: 131K SP, 88K STEEM, and 909 SBD burned in 41K burnsteem25 posts
I just take the supply measurements from steemdb.io at two different times and figure out the rate of change. i.e.
( Supply_at_time_1 - Supply_at_time_2 ) / (time_1 - time_2)