Population Density: Central and South America

This map depicts population density in Latin and Central America in 1960. It is of particular interest to me for temporal comparison analysis. It would be a very interesting study to compare population density in Latin and Central America fifty years ago to the present.
From my observations, the population density patterns have not drastically changed. As previously mentioned, humans tend to settle near coastal areas. In terms of population density, itself, there are no dramatic shifts except for population density relatively being more crowded in Central America. This is due to its history (US-Central America relations) during the time period. This data could contribute to my research on Central America (patterns such as tourism, investments, immigration/emigration affecting population density). It would also be helpful to compare Central America population density patterns to South America population density patterns and analyze why Central America’s population was so much denser during certain time periods than South America’s.