Quarter	Persons, Seasonally Adjusted
1999-04-01	19724100
1999-07-01	19830500
1999-10-01	19897200
2000-01-01	19842500
2000-04-01	19952800
2000-07-01	20035500
2000-10-01	20012900
2001-01-01	20029000
2001-04-01	20047700
2001-07-01	19988300
2001-10-01	19964800
2002-01-01	19868100
2002-04-01	19916300
2002-07-01	19935500
2002-10-01	19949100
2003-01-01	19871200
2003-04-01	19917000
2003-07-01	19865400
2003-10-01	19865900
2004-01-01	19927300
2004-04-01	19905600
2004-07-01	19918200
2004-10-01	20019400
2005-01-01	20090200
2005-04-01	20106700
2005-07-01	20200200
2005-10-01	20188700
2006-01-01	20259500
2006-04-01	20265500
2006-07-01	20251600
2006-10-01	20283600
2007-01-01	20296500
2007-04-01	20434700
2007-07-01	20477700
2007-10-01	20545600
2008-01-01	20584900
2008-04-01	20645600
2008-07-01	20560500
2008-10-01	20573200
2009-01-01	20497100
2009-04-01	20329500
2009-07-01	20370600
2009-10-01	20442300
2010-01-01	20293900
2010-04-01	20424000
2010-07-01	20504700
2010-10-01	20583300
2011-01-01	20632200
2011-04-01	20623400
2011-07-01	20628400
2011-10-01	20695400
2012-01-01	20699700
2012-04-01	20753800
2012-07-01	20834400
2012-10-01	20942200
2013-01-01	20878800
2013-04-01	20951100
2013-07-01	20974500
2013-10-01	21109100
2014-01-01	21252600
2014-04-01	21343100
2014-07-01	21415700
2014-10-01	21501200
2015-01-01	21532000
2015-04-01	21513800
2015-07-01	21536000
2015-10-01	21667500
2016-01-01	21693600
2016-04-01	21789600
2016-07-01	21799700
2016-10-01	21854300
2017-01-01	21898500
2017-04-01	22061500
2017-07-01	22074200
2017-10-01	22130400
2018-01-01	22178300
2018-04-01	22159400