Sharepoint Performance scorecard add dimensions set new members checked automatically

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SharePoint2010

I have a performance scorecard and I have taken the SharePoint list column values as dimensions.

In set members under dimensions I would like to make all the new members to check automatically.

Generally we do this manually but if we add a new item to the list that is coming under set members but its not checked automatically...

Again and again, I need to select manually and make it checked through performance dashboard designer, which is painful process when I add new values to the SharePoint list.

I would like to automate this whenever we add a new item to the list, the value should get added as checked.