Quarter	Persons
1999-04-01	20344800
2000-04-01	20393100
2001-04-01	20344500
2002-04-01	20077900
2003-04-01	19748600
2004-04-01	19475300
2005-01-01	19629200
2005-04-01	19872100
2005-07-01	20083500
2005-10-01	20129600
2006-01-01	19882100
2006-04-01	20209200
2006-07-01	20451500
2006-10-01	20651500
2007-01-01	20267100
2007-04-01	20635500
2007-07-01	20972500
2007-10-01	20947100
2008-01-01	20667900
2008-04-01	20810000
2008-07-01	21321200
2008-10-01	21147200
2009-01-01	20666100
2009-04-01	20661400
2009-07-01	20773100
2009-10-01	20960100
2010-01-01	20088100
2010-04-01	20289600
2010-07-01	20532000
2010-10-01	20575400
2011-01-01	20340900
2011-04-01	20678100
2011-07-01	20884100
2011-10-01	21050500
2012-01-01	20647600
2012-04-01	20850600
2012-07-01	21170300
2012-10-01	21120700
2013-01-01	20715800
2013-04-01	21075400
2013-07-01	21192500
2013-10-01	21260700
2014-01-01	20921700
2014-04-01	21105200
2014-07-01	21405500
2014-10-01	21405200
2015-01-01	21175800
2015-04-01	21130900
2015-07-01	21440900
2015-10-01	21662900
2016-01-01	21769800
2016-04-01	21761500
2016-07-01	22125600
2016-10-01	22165700
2017-01-01	21919500
2017-04-01	22002000
2017-07-01	22449800
2017-10-01	22312800
2018-01-01	22155000
2018-04-01	22108900