Year Persons 2000-01-01 20992650 2001-01-01 21133350 2002-01-01 21297300 2003-01-01 21448400 2004-01-01 21612600 2005-01-01 21803775 2006-01-01 22016650 2007-01-01 22207675 2008-01-01 22402200 2009-01-01 22584000 2010-01-01 22754525 2011-01-01 22944100 2012-01-01 23075400 2013-01-01 23191200 2014-01-01 23342150 2015-01-01 23516250 2016-01-01 23671000 2017-01-01 23795250