SAP BO ,WEBI Charts: Want to display top 10 departments

Hi Guys.

I am new to webi charts,

In Webi charts, I want to display the top 10 departments who are spending more in printing with amount, if possible year wise.

But the chart which i created it is not looking relevant and very confusing.

And in Legend it is displaying all the departments and that to it is not fitting in one page,

So i am thinking to display only top 10 departments, Can you help me.

we are using 3 version