In which direction is the future of the Iranian family heading? The average number of Iranian family members decreased from 4.8 people in 1335 to 3.19 people in 1400. The estimates of 1,404 also indicate the continuation of this trend; While Sistan and Balochistan with 3.6 persons and Gilan with 2.8 persons have the highest and lowest average number of family members. Read the full text at the link below.