Instead of top n filter you can create a rank field like:
RANK(sum([Values])) <= [parameter]
And do the calculation table down. Basically you should have year dimension unchecked in edit calculation of rank.
I would like to attach the workbook b/c I do not understand your solution.
I have attempted to create a data source filter to eliminate a few sensitive items; however, the filter is not working (still see the data).
How can I use a data source filter to Cleanse the data?