when are the wikimania conferences?
wikimania 2005, wikimania 2006, wikimania 2007, wikimania 2008, wikimania 2009, wikimania 2010, wikimania 2011, wikimania 2012, wikimania 2013, wikimania 2014
what are the attendance amounts for each conference?
380, 400, 440, 650, 559, about 500, 720, 1,400, 700, n/a
which conference had the least attendance?
wikimania 2005