This is informative data.
COVID-19 is a mostly a threat to susceptible populations [we knew that] but the chart confirms it. More importantly, it speaks to the *innate virulence* of the virus.
IOW, the Plague virus carried a 95%[!] mortality rate: it pretty much didn’t matter who you were or how healthy you were or etc. If you got the Plague you were almost certainly going to die. Other evidence suggests that the COVID virus isn’t particularly virulent—it can’t be, when there are so many asymptomatic carriers.