Kaganovitch,
Your figures about the average family size are wrong and unsubstantiated.

 ‘In Nigeria highest in the world it is 12 children.’ Actually, the highest is Niger with 6.2 children on average per family.

‘Pakistan is 10 and Egypt is 9.’ Correct figures are 2.7 for Pakistan (no 71) and 3.5 for Egypt (no 43).

 My source is https://www.cia.gov/library/publications/the-world-factbook/rankorder/2127rank.html#eg

What is your source?