Year Persons 2003-01-01 15275 2004-01-01 16925 2005-01-01 15675 2006-01-01 15375 2007-01-01 16475 2008-01-01 17925 2009-01-01 18600 2010-01-01 18275 2011-01-01 18350 2012-01-01 17350 2013-01-01 16775 2014-01-01 15525 2015-01-01 14375 2016-01-01 13975 2017-01-01 14625