COUNT() BASED ON MULTIPLE WHERE CONDITIONS

Dear All,

I want to write a query which returns three different counts based on three
different conditions. The following data set and result set
may explain my scenario.

*Table Data *
PersonId work status Year
1 W 2008
2 W 2008
3 T 2008
4 S 2008
5 W 2008
6 T 2007
7 S 2009
*
Required Result set*

Year W_count T_count S_Count
2007 0 1 0
2008 3 1 1
2009 0 0 1

I could write three separate queries for this like

select count(PersonId) as W_count from my_table where Year = 2008
and workstatus = 'W'

can I get the whole result in a single query?

Thanks all.
roshni