Crosstab Report Column by Month

Good Morning All;

I have struggled with this report and need some assistance. I have written an automated Crosstab report in Crystal that would extract data for each month on a rolling prior 6 month period. I have a count of certain criminal offense as the rows and month of occurrence. When there are months of no occurrence then the column is skipped, I would like it to show a "0".

Thanks,

Tim