Average compounded time-taken for Statistics Workbench

Hi,

I recently started using loadUI & ran a simple test by running my SOAPUI script in loadUI. I also added the Statistics workbench & selected a couple of reporting options.

The options which I was particularly interested was how to find out the average compounded time-taken for my test run.
For e.g.:
Request 1 - 2 sec
Request 2 - 3 sec
Request 3 - 2 sec
Request 4 - 1 sec
Request 5 - 4 sec
Request 6 - 4 sec
Request 7 - 2 sec

I am interested in a Creating a graph which will produce a report like this:
Average after 1 Request - 2
Average after 2 Request - 2.5
Average after 3 Request - 2.33
Average after 4 Request - 2
Average after 5 Request - 2.4
Average after 6 Request - 2.66
Average after 7 Request - 2.57

So its the average per Request or Time Taken per request.

How would I add such an option in the Statistics workbench??

Any help would be appreciated...

Thanks...
Gautam