Hadn't looked at the data in a while, but here are the stats from 2/1 to 10/10. Number in () is deaths from all causes
Deaths involving COVID-19
< 1 year: 22 (12,405)
1-4 years: 15 (2,351)
5-14 years: 37 (3,690)
15-24 years: 374 (23,838)
25-34 years: 1,588 (48,782)
Deaths involving pneumonia, with or without C-19, excluding influenza
< 1 year: 114
1-4 years: 77
5-14 years: 107
15-24 years: 482
25-34 years: 1,759
Deaths involving C-19 and pneumonia, excluding influenza
< 1 year: 3
1-4 years: 2
5-14 years: 7
15-24 years: 134
25-34 years: 709
All deaths involving influenza, with or without C-19 or pneumonia
< 1 year: 16
1-4 years: 42
5-14 years: 53
15-24 years: 55
25-34 years: 151
Deaths involving pneumonia, influenza, or C-19
< 1 year: 149
1-4 years: 132
5-14 years: 190
15-24 years: 773
25-34 years: 2,775
Source data (includes numbers for older age brackets):
https://www.cdc.gov/nchs/nvss/vsrr/covid_weekly/index.htm#AgeAndSexOf the 203,043 C-19 deaths reported by the CDC, 160,080 of them (79%) have been age 65 or older.
If you add in the 55-64 year age group, that accounts for 92% of deaths.