I am not getting your requirement, in the attached screenshot you can see one big bubble and many small bubbles on it.
The big bubbles are BPCE and Credit Agricole (names) with values 10500 and 10008 and all remaining names are having very less values i.e, 20 to 255. The difference is huge so you are seeing very small bubbles.
If you exclude this two names BPCE and Credit Agricole then you can see the varying bubbles clearly.
Hope this helps you.
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