Life expectancy

The period life expectancy is the number of years that a person of a particular age is expected to continue living, assuming that future mortality risks on which the mortality table is based remain unchanged.
The period life table is a table indicating the share of newborn children in every 100 thousand that is expected to reach the age of 1, 2 years and so on, based on the actual mortality ratios as observed over a certain period.
Mortality risk means the probability of dying before reaching the next age. The mortality risk is calculated as the observed number of deaths in the selected period per 100 thousand in the average (actual) population with the same age and sex.

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