Literal question
3. How old are you (in completed years)?
Write down the number and mark:
For those younger than 1 year: "00"
For those younger than 10 years: "01", "02", "03", etc. as necessary.
For those older than 99 years, "99"
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Interviewer instructions
Question 3. How many completed years old are you?
Write down the number and mark:
[] "00" for those younger than 1 year
[] "01", "02", "03", etc. for those younger than 100 years
[] "99" for those age 99 or older
You should write down the age in completed years at zero hour of the Census. If the person that you are enumerating had a birthday on the day of the Census you should use the age that they were the day before.
It is very frequent that people tend to round the age to years ending in 0 and 5, because they do not remember well and do not take the time to do so, or for other reasons.
When you perceive that the age declared cannot be correct, point out that it is very important for the Census that the ages of people be exact. In all cases remember that the Census information is totally confidential and this is assured by Law.
Observe that also here -- for the best security in the later processing of the information -- you should indicate the number of years completed in two different forms. On one side you should write down the number in the blank boxes meant for this purpose, and also mark this same number, filling in the boxes that are below. If the number is 3, write down and mark "03", if it is 12, write down and mark "12". If the number is 100 or older, write down and mark "99".