The decade of life during which most people die depends on various factors such as region, healthcare, lifestyle, and socioeconomic conditions. Generally, in developed countries with better access to healthcare and improved living conditions, the mortality rate tends to increase with age.
Historically, the age group with the highest mortality rate is typically the elderly population. In many developed countries, the highest mortality rate is observed in people aged 80 and above. This age group is often associated with a higher risk of age-related diseases and conditions, such as heart disease, stroke, cancer, and dementia.
However, it's important to note that mortality patterns can vary significantly based on location, public health measures, medical advancements, and societal changes. Additionally, mortality rates have been changing over time due to improvements in medical care, lifestyle changes, and other factors.
It is always important to consider the specific demographic and context when discussing mortality rates and age distribution. For the most current and accurate information on mortality patterns in a particular region, it is best to refer to official data from government health agencies or international organizations.