World population

[alellas]

year 0 - 200 000 000 people
year 1800 - 1 000 000 000 people
year 1930 - 2 000 000 000 people
year 1960 - 3 000 000 000 people
year 1974 - 4 000 000 000 people
year 1987 - 5 000 000 000 people
year 1999 - 6 000 000 000 people
year 2011 - 7 000 000 000 people
year 2024 - 8 000 000 000 people
year 2045 - 9 000 000 000 people