Year Number 2004-01-01 7025 2005-01-01 7538 2006-01-01 13635 2007-01-01 19368 2008-01-01 19109 2009-01-01 25740 2010-01-01 27976 2011-01-01 26352 2012-01-01 25087 2013-01-01 16234 2014-01-01 16489 2015-01-01 15107 2016-01-01 15345