Hi Nate, it's not quite working. I changed the headers of the "Data" columns to the "YYYY - QQ" format and also the table to the left and they match exactly. I pasted your code into the VBA "worksheet" module. When I change either Start or Stop lists I receive this error message: Run-time error '1004: Method 'Range' of object'_Worksheet' failed". And the title line of the code is highlighted when debugging. Any suggestions to fix it? Thanks again. David