I was just looking at the Stack Exchange website and noticed that Server Fault is down to just <s>108 102 99 98 97 96 91</s> 89 [questions][1] per day. This has dropped from [130 in Aug 2012][2] and I have a vague recollection of it being over 140 at one time.

How is the displayed questions per day calculated ?   


  [1]: http://stackexchange.com/sites#users
  [2]: http://meta.serverfault.com/a/3601/9517