Just read another one that's similarly shocking. Population of Berlin in 1925 : 4M , population in 2007 : 3.5M
If you look at a graph of the population of any (current) major city in the US or the US as a whole, it's pretty much an undisturbed exponential, we just keep growing and growing. (by current major city I mean LA, NY, Seattle, Houston, something that's still a healthy city, not Detroit, Cleveland, etc. that have died).