[zackzackzack]

That is one of the main problems with bubble charts. Unless you have a sophisticated packing algorithm, the layout of the chart won't have much meaning. For comparing the projects between countries, another method of display will have to be used.

[Panos]

Perhaps a treemap?

[zackzackzack]

http://mbostock.github.com/d3/ex/treemap.html

This would have been a better choice. It displays the same sizing information but keeps positioning the same.