How to create charts or graphs for BW Statistic Report workbooks

To All:

I successfully created 5 BW Statistic Report workbooks. Now i have the requirement to add automated excel graphs for these 5 workbooks.

My 5 BW Statistic workbooks are divided in to two

categories, three worbooks are for load analysis and two are for Query performance analysis.

please give me an idea or documentation for how to add charts or graphs to these workbooks. my email is rafi.sap@gmail.com.

Thank you for your generous help.