Year Number 2004-01-01 12627 2005-01-01 13714 2006-01-01 14512 2007-01-01 15775 2008-01-01 16732.2500 2009-01-01 17213 2010-01-01 17498.1192 2011-01-01 17198 2012-01-01 16602 2013-01-01 16143 2014-01-01 15773 2015-01-01 15433.0000 2016-01-01 15009.0000 2017-01-01 14939.0000