Source Data Reference for:

City = Barcelona
Time = 2000

City Year Size Size Comment Year Comment Author Title Location
Barcelona1975 3,500,000Tertius ChandlerFour thousand years of urban growthp511
Barcelona2000 1,496,300n/aInstituto Nacional de Estadistica
Barcelona2010 5,083,000United NationsWorld Urbanization Prospects Report
Barcelona2011 4,210,000n/ahttp://demographia.com/