Add extra (dynamic)series in Graph

Hi all,

I'm working in SAP BO Webi 4.0 and am walking against a hard brick wall. So maybe you guys can help me :-)

The following figure shows the data i'm geting as output from my query. Both tables are from the same query.

The left table has one extra column "Berp Grp".

Image may be NSFW.
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Now I created the following graph. I added "ziektedag" on the x-axis, "AOGemiddelde" on y-axis.

The graph shows the lines for "Agrarisch" and "Bouwnijverheid".

My question: is it somehow possible to add an extra line that shows the set of data as shown in the right table?

Image may be NSFW.
Clik here to view.

Thanks in advance!

Joost van Poppel