version   period  players  runes  winners  winrate
   0.11   10/2012    1545    400     214     1.18%
   0.10    3/2012    1568    372     183     1.10%
   0.9     8/2011    1337    264     116     0.86%
   0.8     5/2011    1523    264     108     0.79%
   0.7     8/2010    1091    229     109     0.72%
   0.5     8/2009     737    208      90     1.01%
   0.4     8/2008     385    101      50     1.23%

Notes:
* Crawl tournaments are hold after releases. Since 0.5, there are two
   releases each year, traditionally in February and September.
* runes = number of players who got at least one rune
* tournaments up to 0.7 took the whole of August; tournaments since
   0.8 take 16 days (three weekends).
* The 0.4 tournament started with a single server (CAO);
   the 0.11 tournament used four servers (CAO, CDO, CSZO, CSN).
* Since 0.8, tournaments allow webtiles play.
* Clans were supported from 0.7 and onwards.
* Banners/Awards were given since 0.4.
* Rules for the 0.11 tournament at seleniac.org/crawl/tourney/12b