Power Pivot :: Masking Low Value Cell Count

I have a dataset which contains sensitive person information that can be sliced by various demographic groups.

When I use PowerPivot to query it if I use more than say 5 groups the resulting value within a cell may fall below an acceptable value of say 10 and render the group of people identifiable.

What I would like is some way to generate the lowest group such that any combination < 10 returns 10 and any hierarchy/group above the detail uses this new value for its summary.

Here is an example of how it would look now (I have used only 3 groups Gender followed by Age group and Age to keep it simple):

Gender   Age group   Age Count
 Male                       32 
         20-25              30
                     21      9
                     24     10
                     25     11
         26-30               2
                     30      2

This is how I would like it to look:

Gender   Age group   Age Count
 Male                       <41 
         20-25              <31
                     21     <10
                     24     10
                     25     11
         26-30              <10
                     30     <10

I have actually tried to do it myself but the DAX expression is beyond me. I use ISFILTERED(<column name>) or HASONEVALUE to get the lowest level group (Age) to work but of course I can't get the levels above it in the hierarchy to calculate based upon the interim result... 

IF(HASONEVALUE(Measure[Age]),if([Count]>5,[Count],if(ISBLANK([Count]),0,5)),BLANK())