Year	Persons
1999-01-01	17418775
2000-01-01	18004725
2001-01-01	18043675
2002-01-01	18953150
2003-01-01	19734600
2004-01-01	20366600
2005-01-01	21122625
2006-01-01	21762475
2007-01-01	22412475
2008-01-01	23052150
2009-01-01	23244400
2010-01-01	23350175
2011-01-01	23419225
2012-01-01	23428075
2013-01-01	23178050
2014-01-01	22942775
2015-01-01	22912825
2016-01-01	22812725
2017-01-01	22732425