According to the results of the 2016 Population and Housing Census in I.R.Iran, population aged 30 accounts for the largest proportion of the total nation’s population. This population is 1 million and 329 thousand persons, namely 2.3 percent of the total population. It is necessary to mention that according to the results of the 2016 Population and Housing Census, the total population of the country is 79926270.  Total population by sex and age is posted on the SCI’s portal, Census Section.