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This data is taken from table number 24-6 from page 891 of the report World crude oil production by region and country - 2020.

This data is taken from table number 24-5 from page 890 of the report Known reserves of crude oil in the world by region and country - 2020.

This data is taken from table number 24-3 from page 884 to page 885 of the report Crude birth rate, death rate and child mortality rate in selected countries of the world - 2020.

This data is taken from table number 24-1 from page 880 of the report World population and its forecast by region - 2020.

This data is taken from table number 23-19 from page 873 of the report Real collective consumption - real government consumption - according to the classification of government duties - 2020.

This data is taken from the report The number of newspapers according to the place and distance of publication from 1965 to 2020.

This data is taken from the report Graduates of different academic courses of higher education institutions according to province and gender from 1374 to 1399.

This data is taken from The total number of students by academic courses and gender from preparatory to high school during the years 1347 to 1400.

This data is taken from three (2017, 2018, 2019) national Statistical Center of Iran’s annual report total number of students by academic courses and gender from preparatory to high school during the years 1347 to 1400.

This data is taken from three (2017, 2018, 2019) national Statistical Center of Iran’s annual report about the number of students of universities and centers of higher education and Islamic Azad University according to the main groups of study fields and gender - 1988 to 2021

This data is taken from page 614 of the report The number of literate people according to gender in urban and rural areas between - 1966 - 2016.

This data is taken from table number 23-14 from page 867 to page 868 of the report Account of goods and services - 2020.