Graph may contain a maximum of 5 countries. To change selection, click on x beside country name in the country selector to delete, click on blank space to right of countries list to activate drop down with additional countries that can be displayed.
Zoom-in graphical view
To focus the graph on a sub-set of the time period, drag and click across the graphical surface, highlighting the area that you would like to focus upon. For example, to focus on the years 2005 through , click and hold on the graph surface at the 2005 date and drag the cursor over to . The selected portion of the graph will highlight in blue and upon release will expand to fill the whole space of the graph.