Quarterly Persons
1998-01-01 19779200
1998-04-01 20050700
1998-07-01 20299700
1998-10-01 20233100
1999-01-01 20068400
1999-04-01 20291800
1999-07-01 20548000
1999-10-01 20521200
2000-01-01 20300400
2000-04-01 20619900
2000-07-01 20991200
2000-10-01 21098400
2001-01-01 20937000
2001-04-01 21045200
2001-07-01 21353100
2001-10-01 21341600
2002-01-01 21285200
2002-04-01 21416300
2002-07-01 21628900
2002-10-01 21581200
2003-01-01 21469200
2003-04-01 21716300
2003-07-01 21876700
2003-10-01 21777700
2004-01-01 21717800
2004-04-01 22044700
2004-07-01 22153000
2004-10-01 22164000
2005-01-01 21919300
2005-04-01 22145800
2005-07-01 22020200
2005-10-01 22156400
2006-01-01 22193100
2006-04-01 22562100
2006-07-01 22388400
2006-10-01 22409500
2007-01-01 22188700
2007-04-01 22576100
2007-07-01 22681900
2007-10-01 22622900
2008-01-01 22480200
2008-04-01 22860300
2008-07-01 22805600
2008-10-01 22648300
2009-01-01 22264100
2009-04-01 22505400
2009-07-01 22327300
2009-10-01 22200100
2010-01-01 22029700
2010-04-01 22263700
2010-07-01 22101000
2010-10-01 22212000
2011-01-01 22156600
2011-04-01 22335500
2011-07-01 22196100
2011-10-01 22171500
2012-01-01 22030300
2012-04-01 22288000
2012-07-01 22190100
2012-10-01 22088300
2013-01-01 21695300
2013-04-01 21776500
2013-07-01 21754400
2013-10-01 21795200
2014-01-01 21590000
2014-04-01 21840300
2014-07-01 21916700
2014-10-01 21891100
2015-01-01 21680500
2015-04-01 21985200
2015-07-01 22146800
2015-10-01 22078000
2016-01-01 21908400
2016-04-01 22428900
2016-07-01 22364500
2016-10-01 22262800
2017-01-01 22181500
2017-04-01 22512800
2017-07-01 22588800
2017-10-01 22491400
2018-01-01 22275000
2018-04-01 22807900