Quarter	Persons
1999-04-01	23398300
2000-04-01	23742800
2001-04-01	23668100
2002-04-01	23776500
2003-04-01	23709100
2004-04-01	23939100
2005-01-01	23127600
2005-04-01	23035000
2005-07-01	23005000
2005-10-01	22990900
2006-01-01	22798200
2006-04-01	22717000
2006-07-01	22554800
2006-10-01	22294000
2007-01-01	22686600
2007-04-01	22594500
2007-07-01	22192100
2007-10-01	22132500
2008-01-01	22459500
2008-04-01	22552900
2008-07-01	22024400
2008-10-01	22048300
2009-01-01	22300600
2009-04-01	22231500
2009-07-01	21890600
2009-10-01	21528800
2010-01-01	21366900
2010-04-01	21304700
2010-07-01	21053400
2010-10-01	20936100
2011-01-01	20738700
2011-04-01	20360000
2011-07-01	20137400
2011-10-01	20104900
2012-01-01	20522300
2012-04-01	20322300
2012-07-01	19894900
2012-10-01	20009600
2013-01-01	20019900
2013-04-01	19776500
2013-07-01	19638900
2013-10-01	19710400
2014-01-01	19742100
2014-04-01	19673100
2014-07-01	19305300
2014-10-01	19437000
2015-01-01	19648200
2015-04-01	19706500
2015-07-01	19448600
2015-10-01	19342800
2016-01-01	19459000
2016-04-01	19477800
2016-07-01	18912100
2016-10-01	18871500
2017-01-01	19276500
2017-04-01	19073700
2017-07-01	18836100
2017-10-01	18585100
2018-01-01	19082000
2018-04-01	18992600