Quarter	Persons, Seasonally Adjusted
2005-01-01	509101000
2005-04-01	510848000
2005-07-01	513366000
2005-10-01	515180000
2006-01-01	517208000
2006-04-01	519739000
2006-07-01	522295000
2006-10-01	524572000
2007-01-01	526254000
2007-04-01	527899000
2007-07-01	529082000
2007-10-01	531105000
2008-01-01	532280000
2008-04-01	532570000
2008-07-01	531582000
2008-10-01	529216000
2009-01-01	524278000
2009-04-01	521163000
2009-07-01	520168000
2009-10-01	520067000
2010-01-01	519603000
2010-04-01	521265000
2010-07-01	521980000
2010-10-01	521809000
2011-01-01	524178000
2011-04-01	525136000
2011-07-01	525607000
2011-10-01	527016000
2012-01-01	527855000
2012-04-01	529798000
2012-07-01	530415000
2012-10-01	530523000
2013-01-01	530298000
2013-04-01	532044000
2013-07-01	532678000
2013-10-01	533957000
2014-01-01	536109000
2014-04-01	537385000
2014-07-01	538708000
2014-10-01	540516000
2015-01-01	542347000
2015-04-01	543529000
2015-07-01	545495000
2015-10-01	547967000
2016-01-01	550614000
2016-04-01	551517000
2016-07-01	553448000
2016-10-01	554936000
2017-01-01	557016000
2017-04-01	558656000