Until we can test everyone we don’t don’t the infection rate. So all sata is kinda of worthless... Other than people in hospital, deaths, and people out of hospital.
We know the % that die from infection.
Unless you are assembling actuarial tables to determine likely causes of death for an individual, it is not appropriate to hypothesize about shadowy unconfirmed cases. The only appropriate measure is the number of deaths as a function of the number of known cases. The scientific concept of case fatality rate is based on the resolution of all known cases.