Quarterly 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