1999
C.e 1650
1927
The United-States population reached 100 million in 1920, 200 million in 1967, and 300 million in 2006. It's projected to reach 400 million in 2038, 500 million in 2066, 600 million by 2100, and 1 billion by 2200.
400 million
By 2010, Jordan's population is expected to reach up to 7.1 million.
London
The population first reached 1 million in 1908.
Rome
1880
sometime in the 2080's maybe
in 1934