Some USA mortality stats for context/research:
Infant mortality rates:
(2020 infant deaths down 3% from 2019):
https://www.cdc.gov/nchs/data/nvsr/nvsr71/nvsr71-05.pdf
2019: https://www.cdc.gov/nchs/data/nvsr/nvsr70/nvsr70-14.pdf
Other year Infant Mortality: https://www.cdc.gov/nchs/nvss/linked-birth.htm
Leading causes of death by age, sex, race, etc.:
https://www.cdc.gov/nchs/data/nvsr/nvsr70/nvsr70-09-508.pdf
Total death data:
https://www.cdc.gov/nchs/fastats/deaths.htm
3,383,729 USA deaths in 2020 (9,270 USA deaths per day)
Leading cause of death: heart disease (i.e. “sudden death” heart attacks)
Addtional thread context info:
“When are autopsies performed...”
Most states have similar law language: “...sudden deaths not caused by readily recognizable disease, or wherein the cause of death cannot be properly certified by a physician on the basis of prior (recent) medical attendance...”
Plus many other circumstances for autopsies:
https://www.lawyers.com/legal-info/criminal/criminal-law-basics/autopsies-finding-out-why-may-be-required.html