Following on graphical representations of how a select subset of Latin American nations rank in terms of per capita incomes, the following chart represents the percentage change of per capita income year on year from 2010 to 2011*:
*International Monetary Fund, World Economic Outlook Database, April 2011
InsightSur 
The change is interesting but it would be more useful if at least another chart was provided to compare base incomes and perhaps others such as change over several years…