Year Persons 2003-01-01 11275 2004-01-01 11800 2005-01-01 12500 2006-01-01 13425 2007-01-01 14075 2008-01-01 14700 2009-01-01 14800 2010-01-01 14950 2011-01-01 15325 2012-01-01 15475 2013-01-01 16400 2014-01-01 16975 2015-01-01 17675 2016-01-01 17975 2017-01-01 18150