Quarter	Persons
1999-04-01	17295000
2000-04-01	17314400
2001-04-01	17494400
2002-04-01	17590700
2003-04-01	17778800
2004-04-01	17723100
2005-01-01	18369900
2005-04-01	18274600
2005-07-01	18396400
2005-10-01	18478100
2006-01-01	18614300
2006-04-01	18653200
2006-07-01	18790900
2006-10-01	18828800
2007-01-01	18678800
2007-04-01	18796900
2007-07-01	18996500
2007-10-01	19069100
2008-01-01	18782800
2008-04-01	18757200
2008-07-01	19048500
2008-10-01	19151100
2009-01-01	18878500
2009-04-01	18951200
2009-07-01	18921100
2009-10-01	19329200
2010-01-01	18715600
2010-04-01	18689400
2010-07-01	18744600
2010-10-01	18896700
2011-01-01	18830500
2011-04-01	18942500
2011-07-01	19114700
2011-10-01	19169400
2012-01-01	18865100
2012-04-01	19018200
2012-07-01	19163800
2012-10-01	19192600
2013-01-01	19186000
2013-04-01	19293600
2013-07-01	19368100
2013-10-01	19339400
2014-01-01	19347200
2014-04-01	19378200
2014-07-01	19473600
2014-10-01	19508400
2015-01-01	19477500
2015-04-01	19477900
2015-07-01	19481600
2015-10-01	19691100
2016-01-01	19894300
2016-04-01	19763800
2016-07-01	19960200
2016-10-01	19972600
2017-01-01	19895100
2017-04-01	19800900
2017-07-01	20112300
2017-10-01	20123300
2018-01-01	19986200
2018-04-01	19829700