I need to track contract end dates for staff at three centres, my spreadsheet
looks like this:

centre end date
TJAS 1/10/10
ACT 1/9/10
ACB 1/12/10

I need a summary table that shows how many staff from each centre have a
contract end date in a particular month e.g.
TJAS ACT ACB
January 1 3 8

is there a formula i could use that would work this out for me?