Notes
| Source: USA data from Russell Lopez, . Canadian values constructed using Lopez's method from Canadian census tract profiles for years 1971, 1981, 1991, 2001, and 2011. See: Lopez, Russell. 2014. "Urban Sprawl in the United States: 1970–2010." Cities and the Environment 7 (1): Article 7. Lopez, Russell, and H. Patricia Hynes. 2003. "Sprawl in the 1990s: Measurement, Distribution, and Trends." Urban Affairs Review 38 (3):325–55. |