Year Persons 2000-01-01 11150 2001-01-01 10350 2002-01-01 11575 2003-01-01 12950 2004-01-01 13200 2005-01-01 12550 2006-01-01 12850 2007-01-01 16600 2008-01-01 20575 2009-01-01 31000 2010-01-01 32725 2011-01-01 31475 2012-01-01 32100 2013-01-01 30325 2014-01-01 25275 2015-01-01 20450 2016-01-01 18550 2017-01-01 16550