the problem with all of these numbers is that no one knows how many people have actually been infected - unless every single person were tested the total number of infected can never be known and trying to figure out the percentage of people that die is impossible when you only have the numerator.
Right now there could be hundreds of thousands, perhaps even millions of people world wide that have been infected that either had no symptoms or very moderate symptoms that never even knew they had it and will never be tested.
without both the numerator and the denominator you might as well be throwing darts an numbers on a dart board - - its all just guess work
Heck unless they at some point run antibody tests on every single person in the country the real mortality rate will never be known