I have a set of warranty orders that each have a date when the product was
originally shipped and a date when a problem was reported. I am trying to
make a pivot chart with months on the x-axis and counts on the y-axis. I
want 2 series, one that shows how many orders were shipped in each month and
one that shows how many problems were reported each month. I do not want to
show the relationship between the report and ship dates, just unique counts
of each based on date. Is this possible? Here is an example of what my data
looks like, I have about 6,000 entries so there are significant counts for
each month:

ID Ship Month Report Month
1 4-07 7-08
2 2-08 6-08
3 5-06 4-07
4 9-07 11-07