Year	Persons
1998-01-01	21317425
1999-01-01	21105800
2000-01-01	20925650
2001-01-01	20765650
2002-01-01	20599575
2003-01-01	20452525
2004-01-01	19856725
2005-01-01	20136025
2006-01-01	20129375
2007-01-01	20263125
2008-01-01	20165450
2009-01-01	20518800
2010-01-01	20647450
2011-01-01	20654050
2012-01-01	20180275
2013-01-01	20351650
2014-01-01	20179350
2015-01-01	20091950
2016-01-01	19681700
2017-01-01	19420400