likely china and india are chosen as they are in the progress of uplifting poor populations, and the effect can be reflected here (with china already done much more progress).
Not every graph has to compare every country in the world all at once. However if you use the sites provided/named in the graphics, you can whip up your own comparison of any of those countries quite quickly.
Where’s the rest of Europe, where’s Africa, and where’s the Middle East ???
likely china and india are chosen as they are in the progress of uplifting poor populations, and the effect can be reflected here (with china already done much more progress).
The chart would be useless with too many, as you would not be able to identify it even see the lines.
Not every graph has to compare every country in the world all at once. However if you use the sites provided/named in the graphics, you can whip up your own comparison of any of those countries quite quickly.