Thanks for this table.
However, the current supply is:
264,097,168.715 STEEM (Virtual supply 266,372,024.567 STEEM).
This is less than the 273,750,000 STEEM you have in your table for 2017.
Are the values in your table for the beginning or the end of the year?
I checked these numbers from the op. They don't agree with my calculations. I think he is showing too many coins in issue in the erlier years and too few in the later years, in otherwords he is under-stating the inflation rate. To me it seems that the inflation rate is very variable but almost always above 15%, and occaisionally reaching 50% p.a. e.g. between 31/10/18 and 31/12/18. Now in late Feb it seems to be down to 16%.