I must point out that the queue will never get to zero. This is because clicking 'Do not close' doesn't remove it from the queue, it just removes it from *your* queue. You can see this by clicking on some of the history links:

http://serverfault.com/review/close/33573

![Close vote example][1]

Which is kinda cool, but points out that a question can be presented to many people before it is fully expunged. The only way to guarantee kick it out, is to cast the 5th vote, or be a mod and vote-to-close.

  [1]: https://i.sstatic.net/WfMCh.png