The codes of the countries and of the tables contain in the Archives are interpreted as follows:

1)  all the files with data on life-tables have an initial code which may be, for example:  M0013638 

     where

     M = male;   001 = is the code of Egypt;   3638 = the last four numbers indicate the time period of

     the table, which is in this case 1936-1938.

2)  in the file of the age-specific fertility rates  the  code 135973, for example,  represents the data  for

     Namibia (code 135) observed in the year 1973.

3)  in the files of the censuses the code M01466, for example, represents male data for Algeria collected

     in the year 1966