Reporting Services: how to know when people are absent?

[jpa]

Hi
(PS2007 +SP1 +PIU)
I'd like to visualize thru Reporting Services when people are absent or not.
Non working time is entered using Project Professionnal where you can even
precisely define which hours the person is absent and add text to qualify the
absence reason (eg: holidays, illness,...).
Please can somebody tell me in which database table this information can be
retrieved?

Thanks in advance
jpa