The level of Vietnam is relatively high, reaching the level of moderately developed countries. Cambodia has the lowest life expectancy, which is related to its natural environment. Life expectancy in Cambodia is at a low level in the world, which is 20 years less than the average life expectancy of the world population.
Life expectancy can reflect the quality of life of a society. Socio-economic conditions and health care level limit people's life span. Therefore, the life span of people varies greatly in different societies and different periods.
At the same time, due to personal differences such as physique, genetic factors and living conditions, everyone's life expectancy is also very different.
Extended data:
Meaning:
The average life expectancy of the population is an index to measure a social and economic development and the level of medical and health services. The average life expectancy of Europeans in BC was only about 20 years old, and then it continued to slowly extend, reaching 40 years old at around 1850, and finally doubled in the long history of nearly 2000 years.
According to this calculation, the average life expectancy is only one year longer every hundred years. This extremely slow growth rate is obviously related to the slow development of productivity in ancient society. /kloc-the 0/9th century is a turning point. With the industrialization revolution and the liberation of social productive forces, the average life expectancy of the population has risen rapidly!
From 1850 to 100, the average life expectancy of Europeans has increased by more than 30 years, reaching an average of 72 years according to the United Nations population yearbook 1977, which is inseparable from the progress of medical technology and the improvement of health environment.
In particular, the discovery of antibiotics and the application of immunization have eliminated various epidemic infectious diseases (such as cholera, smallpox, plague, etc.). ) That killed a large number of ancient people, making the average life expectancy of European population increase by 2.3 years every ten years in this century, in sharp contrast with ancient times.
Calculation method:
A series of mathematical formulas are used to calculate the average life expectancy of the population. If described in words, the average life expectancy of the population is calculated by following up a group of people born at the same time, recording their deaths at all ages until the end of the last person's life, and then calculating the average life expectancy of the population according to the number of people who live to all ages.
Use the average life expectancy of this group of people to assume that the average life expectancy of a generation is the average life expectancy. In fact, it is very difficult to track the whole life process of a group of people born at the same time.
In practical calculation, we can often replace the mortality level of the same generation at different ages with the mortality level of the population at all ages in the same year, and then calculate the average number of people at all ages, thus calculating the average life expectancy of the population in that year. Therefore, the average life expectancy of the population is related to the contemporary mortality level.
Average life expectancy of China residents:
The National Health Commission recently released the statistical bulletin of China's health development in 20 17. The report shows that in 20 17, the average life expectancy of China residents increased from 76.5 years in 20 16 to 76.7 years, the infant mortality rate decreased from 7.5‰ to 6.8‰, and the maternal mortality rate decreased from 19.9/ 19.6/65438.
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