Quarter	Persons
1999-04-01	17774400
1999-07-01	17471400
1999-10-01	17558500
2000-01-01	17756600
2000-04-01	17758600
2000-07-01	17519600
2000-10-01	17751500
2001-01-01	17914500
2001-04-01	18051100
2001-07-01	17805900
2001-10-01	17875100
2002-01-01	18109500
2002-04-01	18055800
2002-07-01	17870300
2002-10-01	17911300
2003-01-01	18141200
2003-04-01	18148600
2003-07-01	17953100
2003-10-01	18061900
2004-01-01	18169200
2004-04-01	18272400
2004-07-01	18168600
2004-10-01	18221300
2005-01-01	18244100
2005-04-01	18412000
2005-07-01	18199800
2005-10-01	18264700
2006-01-01	18323200
2006-04-01	18313500
2006-07-01	18089900
2006-10-01	18318900
2007-01-01	18528500
2007-04-01	18614800
2007-07-01	18409500
2007-10-01	18497900
2008-01-01	18587100
2008-04-01	18622500
2008-07-01	18467600
2008-10-01	18549400
2009-01-01	18692200
2009-04-01	18893000
2009-07-01	18708800
2009-10-01	18932800
2010-01-01	19186100
2010-04-01	19147500
2010-07-01	18841100
2010-10-01	19110200
2011-01-01	19253400
2011-04-01	19320500
2011-07-01	19157400
2011-10-01	19256600
2012-01-01	19420500
2012-04-01	19414500
2012-07-01	19165200
2012-10-01	19193400
2013-01-01	19399300
2013-04-01	19451100
2013-07-01	19169200
2013-10-01	19355200
2014-01-01	19438500
2014-04-01	19513500
2014-07-01	19329200
2014-10-01	19538700
2015-01-01	19539000
2015-04-01	19701300
2015-07-01	19477400
2015-10-01	19522300
2016-01-01	19636900
2016-04-01	19596000
2016-07-01	19466400
2016-10-01	19626300
2017-01-01	19732900
2017-04-01	19763100
2017-07-01	19687800
2017-10-01	19705400
2018-01-01	19731900
2018-04-01	19850100