Human Life-Table Database

Explanation of Data Files

The Human Life-Table Database includes the following types of data:

The HLD life tables are given in a tabular form as text files with comma-separated values. The following columns are given in each table:

Country United Nations 4-digit country-code followed by two digits, which are used for additional coding of ethnic groups or regions within country (when needed)
Year1 Beginning of the calendar period
Year2 End of the calendar period
TypeLT Type of HLD life table (see Methodology Note)
Sex 1-males 2-females
Age Lower limit of age interval (age x)
AgeInt Length of age interval. Usually, has a value of 1, 4 or 5. Value 99 is used for the last age group w. In original life tables of types 1,2, and 5 it corresponds to an age group with a "+" (100+, 90+, 110+). In recalculated life tables of types 3, 4 or 6 it corresponds to the age group with q(w)=1
m(x) Central death rate at age x
q(x) Probability of death at age x
l(x) Number of survivors to age x
d(x) Death number at age x
L(x) Number of person-years lived at age x
T(x) Number of person-years lived after age x
e(x) Life expectancy at age x

The general structure of the text files is as follows: type 1 life table male and female, type 2 life table male and female, type 3 life table male and female and type 4 life table male and female.

The columns of the originally published life table, which are used to produce HLD life tables of types 1, 2, 5 and 6, are marked by an asterisk e.g. "l(x)*", "e(x)*".

Images of published life tables are on the web in portable document format (PDF).
This would require a copy of Adobe Acrobat Reader (version 3.0 or higher) which is available at no charge from the Adobe Homepage.


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