Quarter	Persons, Seasonally Adjusted
2005-01-01	320692000
2005-04-01	321536000
2005-07-01	322709000
2005-10-01	323114000
2006-01-01	324758000
2006-04-01	326023000
2006-07-01	326976000
2006-10-01	328028000
2007-01-01	328650000
2007-04-01	329463000
2007-07-01	330103000
2007-10-01	330667000
2008-01-01	330630000
2008-04-01	330345000
2008-07-01	329623000
2008-10-01	328056000
2009-01-01	324415000
2009-04-01	322083000
2009-07-01	320452000
2009-10-01	319633000
2010-01-01	319407000
2010-04-01	319823000
2010-07-01	320262000
2010-10-01	320141000
2011-01-01	321163000
2011-04-01	321254000
2011-07-01	321242000
2011-10-01	321927000
2012-01-01	322720000
2012-04-01	323544000
2012-07-01	323859000
2012-10-01	324419000
2013-01-01	324207000
2013-04-01	324880000
2013-07-01	325403000
2013-10-01	325834000
2014-01-01	327458000
2014-04-01	328397000
2014-07-01	329095000
2014-10-01	330063000
2015-01-01	330578000
2015-04-01	331107000
2015-07-01	331857000
2015-10-01	332981000
2016-01-01	334944000
2016-04-01	335192000
2016-07-01	336264000
2016-10-01	336972000
2017-01-01	337751000
2017-04-01	338789000