what were all of the wikimania conferences?
wikimania 2005, wikimania 2006, wikimania 2007, wikimania 2008, wikimania 2009, wikimania 2010, wikimania 2011, wikimania 2012, wikimania 2013, wikimania 2014
how many people attended each conference?
380, 400, 440, 650, 559, about 500, 720, 1,400, 700, n/a
and which conference had the highest attendance?
wikimania 2012