cities of
500,000+
This draws its statistics for 1950 to 2030 from United Nations, Department of Economic and Social Affairs, Population Division (2014), World Urbanization Prospects: The 2014 Revision, and from Chandler, Tertius (1987), Four Thousand Years of Urban Growth: An Historical Census, Edwin Mellen Press, Lampeter, UK, 656 pages for statistics from 1800 to 1900.