Pivot Table - Autoselect aggregation value

I have a pivot table.

When I select any of the aggregations:

LIST_UNIQUE_VALUES
SUM
etc 

I want it to automatically select my value “KWH” instead of having to select it. As I only have 1x possible value for it to choose from. Ideally I would like to remove the [sub] select box too…

make_default

I can’t find any way to set e.g. something like:

<chart:aggregations default="LIST_UNIQUE_VALUES">
    <chart:aggregation mode="LIST_UNIQUE_VALUES"
          **defaultSubValue = "KWH"/>**
    <chart:aggregation mode="SUM" />
 </chart:aggregations>

Actually I think I resolved by adding

<chart:aggregationProperties>
   <chart:property name="kwh"/>
</chart:aggregationProperties>