Year Persons 2001-01-01 317550 2002-01-01 317375 2003-01-01 320850 2004-01-01 319900 2005-01-01 326250 2006-01-01 330150 2007-01-01 331375 2008-01-01 332075 2009-01-01 316050 2010-01-01 301350 2011-01-01 283000 2012-01-01 268050 2013-01-01 259175 2014-01-01 249575 2015-01-01 243325 2016-01-01 231500 2017-01-01 223900