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Note: American metropolitan statistical areas (MSAs) tend to be territorially larger than Canadian census metropolitan areas (CMAs), meaning that the American suburban share of the national population is correspondingly larger than it would be if MSAs were defined according to Statistics Canada’s criteria.
Sources: United States 1930–80 from Pisarski, Commuting in America III, table 2-13, and 1990–2010 from source data for Figure 4-7 in Polzin and Pisarski, Commuting in America, 2013; Canada from Statistics Canada, Census, various years, for the thirty-six CMAs as defined in 2006.
Taylor, Zack, "Figure 1.2 Central Cities and suburbs as a proportion of national population, 1930-2010.pdf" (2019). Shaping the Metropolis: Institutions and Urbanization in the United States and Canada by Zack Taylor. 3.