Man, this is terrible! Are the numbers proportional to radii or areas? How to compare two bubble blobs when bubbles overlap? How to spot the proportions of colo

Man, this is terrible! Are the numbers proportional to radii or areas? How to compare two bubble blobs when bubbles overlap? How to spot the proportions of colors within a blob? This changes are about what? Last year? If so, the most interesting part is how much did it changed, which is simply missing.