113 thousand deaths in the USA
÷3.1 million confirmed cases in the USA
×100
=3.6%
If you stratify your data into age groups, and compare this mortality rate to the normal mortality rate, there most likely is not a big difference to normal.
Using the same variables, I get a slowly declining mortality rate currently around 6.3% for the US which includes a two week span between confirmed and death. Your number is significantly lower. Are you offsetting the death tally?
113 thousand deaths in the USA
÷3.1 million confirmed cases in the USA
×100
=3.6%
Mea culpa, lol.