As noted, the graph highlights that editors of Wikiquote are stable, while Wikinews (as well known) is dropping. The long-term graphs are at http://stats.wikimedia.org/wikiquote/EN/PlotsPngWikipediansEditsGt5.htm (https://bugzilla.wikimedia.org/42318 to have it functional). Wikiquote keeps expanding, especially Italian and Russian, and with the exception of German and Portuguese (all of this since several years ago; Polish and French go up and down): * http://stats.wikimedia.org/wikiquote/EN/TablesDatabaseSize.htm * http://stats.wikimedia.org/wikiquote/EN/TablesWikipediansEditsGt5.htm
Note that it's easy for stats on Wikiquote active editors to give a false picture, especially in English where over half of edits come from unregistered users and the top class of editors only has 21 % of edits. http://stats.wikimedia.org/wikiquote/EN/TablesWikipediaEN.htm#anonymous Wikiquote attracts new and occasional contributors, in most languages. That's a feature, not a bug. ;-)
Nemo