Since it's a paper about the rate of immigration and emigration, you could choose 2 countries from your top 10 list, and say that it surprises you that one has a high immigration rate, and that the other has a high emigration rate. For the spatial geography idea, try choosing a country and explaining why it;s included on the graph, for example, Germany, and what significance it has to the data.
Reason being that Mexico is part of the North American region with Canada and the United states. The central american countries are all those that border below mexico between mexico and Colombia. Hoped this helped.
