Interviewer instructions
Column 4: Age. Age in completed years means the age that the person reached upon their last birthday. One way to verify the correctness of the age stated by the person being enumerated is to ask for their date of birth, if they are able to provide that information.
The enumerator must take into account the common tendency of people to round their age, particularly to figures that end in zero or five. It is especially important to find out the date of birth in these cases.
If the person doesn't know their age, and you can't find any way to determine it, be it by using documents belonging to the individual or references from neighbors, make an estimate of their age. If not present, use information from people present who know the person being enumerated. For those under one year of age, don't forget to write the word "month(s)" immediately after the corresponding number. So, 1 month, 3 months, etc.