Year Persons 2003-01-01 21225 2004-01-01 21450 2005-01-01 20775 2006-01-01 19950 2007-01-01 19075 2008-01-01 18650 2009-01-01 18325 2010-01-01 17700 2011-01-01 18600 2012-01-01 19350 2013-01-01 19725 2014-01-01 19675 2015-01-01 18825 2016-01-01 19150 2017-01-01 18775