Scatter chart, bubble size

[Anonymous]

Hi folks,

I have a scatter chart with a map as background where I display figures (count of contracts) of regions

as bubbles.

I am struggling with the following problem. The bubble size changes when different filters apply and increases

much to much.

E.g. I have only a small dot (3 out of 300), applying another filter wich reduces the total to 150,

the same figure (3 out of 150) is much bigger (maybe bubble size 30).

I tried to define the figure relative to the total, but the same behaviour.

Any ideas are appreciated.

Regards

Rudolf