Thanks for your replies. I ended up creating a template table with all possible grouping values and joining it to my data so each data combo (ie, matrix cell) will...

Yes, I thought of this, but the problem is that there are many cells with no value. That statement will show a border for all of them, even if they...

here's a little piece:

2008-08-01 Individual1On Plan1Old Existing138917

2008-09-01 Individual1On Plan1Old Existing135167

2008-10-01 Individual1On Plan1Old Existing134210

2008-11-01 Individual1On Plan1Old Existing129999

2008-12-01 Individual1On Plan1Old Existing122971

2009-01-01 Individual1On Plan1Old Existing122400

The report starts with 2008-07-01 for most rows. So,...