| 1 - | Data are estimates based on censuses from Bell and Muhidin (2009). "Cross-National Comparisons of Internal Migration." Human Development Research Paper No. 30. New York: United Nations Development Programme, Human Development Report Office. Internal migrants are expressed as a percentage of the total population. |
| 2 - | Data are estimates based on censuses from ECLAC (2007). "Internal Migration and Development in Latin America and the Caribbean: Continuity, Changes and Policy Challenges." In Social Panorama of Latin America: 195-232. Santiago: United Nations. Internal migrants are expressed as a percentage of the total population. |
| 3 - | Data are estimates based on household surveys from the World Bank (2009e). World Development Report 2009: Reshaping Economic Geography. Washington DC: World Bank.. Internal migrants are expressed as a percentage of the working age population only. |
| .. | Data not available |
| (.) | Greater (or less) than zero but small enough to be rounded off to zero at the displayed number of decimal points |
| < | Less than |
| - | Not applicable |
| T | Total |