Population of world in billion
- Population of world in billion 2024
- Population of world in billion 2022
- World population billions
- Population of world in billion 2023
- Population of world in billion 2020
- Population of world in billion 2050
- Population of world in billion 2021
- Population of world in billion 2000
- Population of world in billion 3000
- Population of world in billions by country
- Population of world in billion 2025
- Population of world in billion 2024 by country
- Population of world in billions by age
- Population of world in billion 2100
- Population of world in billions by race