timeframe for Apache's server-status requests/second metric?

[Alex Dean]

Does anyone know the timeframe used for this measurement?  Is is since 
the server restarted, or in the last minute, or what?  I can't find an 
answer in the Apache documentation or via Google searching.

http://httpd.apache.org/docs/2.0/mod/mod_status.html

The details given are:
<snip/>
  * Averages giving the number of requests per second, the number of 
bytes served per second and the average number of bytes per request (*)

But, no information about the timeframe involved...

thanks,
alex