Click on the image for a clear, full-size animation. This was prepared using static UN Urbanization data for 1960, 1980, 2011 and 2025. 
The increasing % of urban population is shown by increasingly dark country colors. Growth in the number and size of large cities is represented with dots: 
- Small Yellow = 1-5 Million
 - Medium Orange = 5-10 Million
 - Large Red = Over 10 Million
 

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