Not that big of a sample, but look what it was near the beginning, and how much it has dropped! If this is accurate, the CFR (ratio) was/is much higher than we were led to believe.
I think it indicates improved treatment effectiveness along with the Coronavirus being far deadlier for some during the initial outbreak, probably for the elderly before stringent quarantines.
Yes, it kills the weak fast, and then tortures a select group to death over, sometimes, months.