vmstat doesn't show me the swapped out processes column

[daniele <spam@modena1.it>]

Hi!
I read on the documentation and on internet that vmstat should show a 
column named 'w' under the header 'procs' which counts the number of 
swapped out processes.
Well, I can't see that column on my output (all other columns are ok).
What can I do to have vmstat report it?
In which other way can I see swapped out processes?

Thanks,
daniele paganelli

debian unstable
Linux paganelli 2.6.14-2-k7 #1 Sat Nov 26 14:04:05 UTC 2005 i686 GNU/Linux