No one has any idea what the fatality rate is. We know the fatality rate of people who were confirmed infected.
We have no way to tell how many people are infected and will remain asymptomatic. They won't go into the survived bucket.
We have no counts of people who have symptoms, have been told "you probably have it" by their doctor, and are then told to stay home and not get tested. I have a few friends in this bucket. These people won't go in the tested positive bucket unless they end up in an ICU. If they recover at home, then they probably won't go in any bucket.
TL;DR: until we can test everyone, we'll have no idea what the fatality rate is.