Counting events pro month

[peewmee]

I've got a table (based on when a certain event occured) like:

event A 12-1-2005
event A 25-1-2005
event B 3-2-2005
event A 6-2-2003
event B 10-4-2005

Based on this table i would like to create a query tot totalize the number of events pro month like:

event A jan 2005 2
event A feb 2005 1
event A mar 2005 0
event A apr 2005 0
event B jan 2005 0
event B feb 2005 1
event B mar 2005 0
event B apr 2005 1

I can't seem to generate records with the zero-totals. I've been breaking my head for several days now, so does someone have a solution?

thanks in advance