Year Persons 1999-01-01 22900 2000-01-01 21375 2001-01-01 20150 2002-01-01 21700 2003-01-01 22400 2004-01-01 21950 2005-01-01 23950 2006-01-01 25725 2007-01-01 21725 2008-01-01 16575 2009-01-01 21200 2010-01-01 26800 2011-01-01 31025 2012-01-01 35200 2013-01-01 40475 2014-01-01 39650 2015-01-01 38375 2016-01-01 32725 2017-01-01 28475