If you are exporting to excel this might help. If you need to break out by month, use the month function and create a field to list the month ex 1,2,3, the # indicates the month. Next create a summary that gives the info you need, then copy and create a seperate tab for each month. Go to file export export all summaries. This will create an excel file with a seperate sheet for each month or summary you have created in the summary function.
firstname.lastname@example.org[/email] if I can assist you