Year Persons 2006-01-01 22384750 2007-01-01 22769000 2008-01-01 23472125 2009-01-01 24323900 2010-01-01 25288350 2011-01-01 26423575 2012-01-01 27021450 2013-01-01 27961325 2014-01-01 28773500 2015-01-01 29653900 2016-01-01 30523975 2017-01-01 31617375