Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
If the respondent knows his date of birth, write it in the appropriate spaces for 'Month' and 'Year'. You will need to convert the month into numbers. For this, January is '01', February is '02', March is '03', etc. If the month or day contains only one digit, use a leading zero to fill in the first space. For example, the month of March is coded as '03'. If he does not know his month of birth, circle '98' for 'DK month' and ask him for the year of his birth. If he knows the year, write it in the spaces for 'Year'. Try under all circumstances to obtain at least the year of birth. If the respondent is unable to provide this information, ask whether he has any documentation such as an identification card, horoscope, or a birth or baptismal certificate that might give his date of birth. If such documentation is available, ask the man if the information on the document(s) is correct. Only when it is absolutely impossible to even estimate the year of birth should you circle '9998' for 'DK year'.
Source of information
The eligible man selected for interview