The data below was originally published here by the CDC on the 10th September 2020.

Infection Fatality Ratio (IFR) is the most important figure listed in the table and represents:

The number of individuals who die of the disease among all infected individuals (symptomatic and asymptomatic). This parameter is not necessarily equivalent to the number of reported deaths per reported case because many cases and deaths are never confirmed to be COVID-19, and there is a lag in time between when people are infected and when they die. This parameter also reflects the existing standard of care, which may vary by location and may be affected by the introduction of new therapeutics.

See the right-hand column as scenario 5 is marked as the current best estimate (click image to enlarge).

As you can see the current best estimates for the Infection Fatality Ratio (IFR) are:

0-19 years: 0.00003
20-49 years: 0.0002
50-69 years: 0.005
70+ years: 0.054

Expressed in a different manner these equate to the following deaths per 100,000 individuals confirmed infected with CV19:

0-19 years: 3 deaths per 100,000 confirmed infected with CV19
20-49 years: 20 deaths per 100,000 confirmed infected with CV19
50-69 years: 500 deaths per 100,000 confirmed infected with CV19
70+ years: 5400 deaths per 100,000 confirmed infected with CV19

Bear in mind however, that in many cases in the US, hydroxychloroquine/chloroquine might not be being utilized as a treatment, even though it has shown outstanding results in many peer reviewed studies (see here for info).

Also, it should be noted, that there is controversy over the CDC's (and other gov's ) figures (see here) as to what counts as a death due to CV19. Oftentimes one will read wording in news reports such as 'died with CV19' and there is good evidence to suppose that only approx 6% of the CV19 fatality figures being provided officially are due to CV19 alone - rather than being most likely due to other long-term serious comorbidities also suffered by individuals. The CDC page linked above states:

For 6% of the deaths, COVID-19 was the only cause mentioned. For deaths with conditions or causes in addition to COVID-19, on average, there were 2.6 additional conditions or causes per death

Also, for comparison, see the table below which lists yearly US deaths in 2017 from a variety of factors (click on image to enlarge):

The above table is from this CDC paper.