Demographic evolution of cities, 1950-2025

A nice chart showing the U.N. estimate for the demographic evolution of cities between 1950 and 2025. (via RC21 Network). 

Here are some other charts based on a similiar idea:

• Urban Hierarchy of 590 cities (1950-2050)
• Relative Rank of American States for Nine Decades (1790-1870)
• Urban hierarchy of the United States over time (1790-2000)
• The Richest Cities in the US in 1978 and Now