Quarter	Persons
1998-04-01	521900
1999-04-01	532400
2000-04-01	537200
2001-04-01	533100
2002-04-01	551900
2003-04-01	541300
2004-04-01	535200
2005-04-01	524100
2006-04-01	559700
2007-04-01	558900
2008-04-01	565800
2009-04-01	564800
2010-01-01	568600
2010-04-01	568500
2010-07-01	590300
2010-10-01	584200
2011-01-01	580100
2011-04-01	581500
2011-07-01	590000
2011-10-01	593600
2012-01-01	575600
2012-04-01	568700
2012-07-01	585700
2012-10-01	574800
2013-01-01	580600
2013-04-01	570000
2013-07-01	570900
2013-10-01	588600
2014-01-01	564800
2014-04-01	568900
2014-07-01	568500
2014-10-01	603000
2015-01-01	571000
2015-04-01	566100
2015-07-01	565100
2015-10-01	577100
2016-01-01	577700
2016-04-01	563800
2016-07-01	562300
2016-10-01	591300
2017-01-01	574600
2017-04-01	562700
2017-07-01	572700
2017-10-01	576700
2018-01-01	548300
2018-04-01	549600