The census is conducted every ten years and in the third round, the type of census is based on registration, which reduced the cost of the census by about 90%. Head of Program and Budget Organization: In Asia, only 4 countries managed to conduct a census according to the registration method, of which Iran is the fifth country.

The census is conducted every ten years and in the third round, the type of census is based on registration, which reduced the cost of the census by about 90%. Head of Program and Budget Organization: In Asia, only 4 countries managed to conduct a census according to the registration method, of which Iran is the fifth country.