1. If the interviewee answers the solar month and the B.E. year, use the following guidelines:

If the person was born during April and December, look up the age in the HPC-9A table and record accordingly. For example, if the person was born in July 2497 B.E. [1936 A.D.], record age "33".

If the person was born before April, i.e. during January and March, look up the age in the HPC-9A table and always add 1 to that age. For example, if the person was born in January 2485 B.E. [1942 A.D.], record age "28".

For children born between January and March 1970, record "0".

2. If the interviewee answers the month and year of birth in the lunar month and zodiac year such as ?born in the 4th month of a rooster year', ask the approximate age of that person. If the person's age is about 20, look up the age in the HPC-9B table, and if the corresponding age is 25, record "25" regardless of whether that person was born before or after the 5th month.

3. If the interviewee does not know the month but knows the B.E. year 2490 B.E. [1947 A.D.], record age "22" according to the PHC-9A table.

4. If the interviewee does not know the month but knows the zodiac year, ask for the approximate age of that person and look up in the PHC-9B table. For example, if the person was born in a tiger year and his age is about 30 years, and the corresponding age in the 30s range for a tiger year is 31, record age "31".

5. If the interviewee knows neither the month nor the year of both, record the age according to what is told.

6. If the interviewee does not know the age at all, write "X".

7. For children younger than 1 year old, record "0".