Year Persons 2003-01-01 33900 2004-01-01 30000 2005-01-01 28300 2006-01-01 27100 2007-01-01 27225 2008-01-01 28850 2009-01-01 27200 2010-01-01 26450 2011-01-01 25975 2012-01-01 24375 2013-01-01 23125 2014-01-01 23075 2015-01-01 23550 2016-01-01 24425 2017-01-01 21100