Interesting. There were 2.3mm in 1910 (http://www.nytimes.com/2012/03/04/realestate/how-many-people-can-manhattan-hold.html http://www.nytimes.com/2012/03/04/re

Interesting. There were 2.3mm in 1910 (http://www.nytimes.com/2012/03/04/realestate/how-many-people-can-manhattan-hold.html http://www.nytimes.com/2012/03/04/realestate/how-many-people...).