Country Descriptors Related to Population and Territory, Financial Indicators, and Health Care Financing
a The World Bank. Available at: http://data.worldbank.org/indicator/all. Accessed November 15, 2014.
b United Nations. Demographic Yearbook. Table 3: Population by Sex, Rate of Population Increase, Surface Area and Density. UN Statistics Division. Available at: http://unstats.un.org/unsd/demographic/products/dyb/dyb2012/Table03.pdf.