Quarter	Persons
2000-04-01	17475700
2001-04-01	17421000
2002-04-01	17553900
2003-04-01	17787200
2004-04-01	18113400
2005-01-01	18047600
2005-04-01	18124200
2005-07-01	18137700
2005-10-01	18261800
2006-01-01	18342300
2006-04-01	18380500
2006-07-01	18357000
2006-10-01	18574000
2007-01-01	18601700
2007-04-01	18664600
2007-07-01	18729200
2007-10-01	18910500
2008-01-01	18918700
2008-04-01	18988000
2008-07-01	19105700
2008-10-01	19168200
2009-01-01	19209900
2009-04-01	19295800
2009-07-01	19355200
2009-10-01	19407500
2010-01-01	19372200
2010-04-01	19530900
2010-07-01	19631800
2010-10-01	19738700
2011-01-01	19827500
2011-04-01	19941800
2011-07-01	19959700
2011-10-01	19941500
2012-01-01	20053700
2012-04-01	20087000
2012-07-01	20159800
2012-10-01	20191800
2013-01-01	20222700
2013-04-01	20276000
2013-07-01	20389100
2013-10-01	20434300
2014-01-01	20578100
2014-04-01	20607600
2014-07-01	20757700
2014-10-01	20735700
2015-01-01	20833700
2015-04-01	20914400
2015-07-01	20962300
2015-10-01	21021800
2016-01-01	21221400
2016-04-01	21306600
2016-07-01	21344900
2016-10-01	21333500
2017-01-01	21512000
2017-04-01	21610400
2017-07-01	21760800
2017-10-01	21730500
2018-01-01	21909700
2018-04-01	21999600