| 1 - | Due to differences in definition of the underlying data, cross country comparisons should be made with caution. Data are from different censuses and surveys and refer to different time periods and so are not strictly comparable. |
| 2 - | 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. |
| 3 - | 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. |
| 4 - | 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 |