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Life expectancy at birth reflects the prospect of a newborn could live for
how many years if the current mortality model is maintained, this is the key
statistical indicator of the Life table.

T
e  0
0
l 0
Where:

e 0: Life expectancy at birth (unit: year);

T 0: Total number of years of the newborns in the Life table who will
continue to live;
l 0: Number of persons who live to the age of 0 of the Life table (the set of
original newborns is observed).

Life expectancy at birth is one of the integrated indicators calculated from
the Life table.

The Life table is a statistical table that includes the indicators showing the
viability of population moving from one age to the next and the mortality of the
population at different ages. The Life table shows that from an initial set of the
births (on the same cohort), there will be how many persons who will live to 1
year, 2 years,..., 100 years,...; among them, there are how many persons at each of
the certain ages who will be dead before the following age; those persons who
have reached a certain age will have what probability of survival and death; how
long is the life expectancy in the future.

Rate of literate population aged 15 and over reflects the ability of
reading and writing of the population, serves to assess the development level of
a country, region or locality.

This indicator is calculated as the rate between the number of persons
aged 15 years and over at specific time who are literate (able to read, write and
understand a simple sentence in the national language, ethnic or foreign
language) and the total population aged 15 years and over at that time.
Literate population aged 15
Rate of literate years and over
population aged 15 = × 100
years and over (%) Total population aged 15 years
and over

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