Unanswered: Chart /crosstab by month misses months with no data
I have a set of data with a date/time stamp on each row. I need to summarize the data (as a simple count of rows) in a crosstab and in a chart, showing the counts by month. This works fine so long as there is at least 1 data point for a month. How can I get the crosstab / chart to show months with no data points?