Year Persons 2003-01-01 13600 2004-01-01 11700 2005-01-01 12900 2006-01-01 12200 2007-01-01 12125 2008-01-01 12875 2009-01-01 15150 2010-01-01 12075 2011-01-01 12275 2012-01-01 13250 2013-01-01 13275 2014-01-01 12125 2015-01-01 19225 2016-01-01 16725 2017-01-01 18000