Year Persons 2001-01-01 15025 2002-01-01 14375 2003-01-01 14725 2004-01-01 16075 2005-01-01 14175 2006-01-01 16050 2007-01-01 14900 2008-01-01 14350 2009-01-01 19350 2010-01-01 20225 2011-01-01 19000 2012-01-01 19550 2013-01-01 17825 2014-01-01 19450 2015-01-01 19575 2016-01-01 19150 2017-01-01 19475