Quarter	Persons, Seasonally Adjusted
2005-01-01	320925000
2005-04-01	321732000
2005-07-01	322801000
2005-10-01	323462000
2006-01-01	324259000
2006-04-01	324936000
2006-07-01	325660000
2006-10-01	326804000
2007-01-01	327681000
2007-04-01	328072000
2007-07-01	328556000
2007-10-01	329533000
2008-01-01	330555000
2008-04-01	331143000
2008-07-01	331636000
2008-10-01	331762000
2009-01-01	331603000
2009-04-01	332050000
2009-07-01	331806000
2009-10-01	331845000
2010-01-01	331377000
2010-04-01	332572000
2010-07-01	332489000
2010-10-01	332145000
2011-01-01	332838000
2011-04-01	333401000
2011-07-01	333723000
2011-10-01	334391000
2012-01-01	334656000
2012-04-01	335815000
2012-07-01	336275000
2012-10-01	336717000
2013-01-01	336682000
2013-04-01	337573000
2013-07-01	337633000
2013-10-01	337581000
2014-01-01	338796000
2014-04-01	339159000
2014-07-01	340211000
2014-10-01	340429000
2015-01-01	341596000
2015-04-01	341602000
2015-07-01	342227000
2015-10-01	343080000
2016-01-01	344591000
2016-04-01	344994000
2016-07-01	345937000
2016-10-01	346414000
2017-01-01	347071000
2017-04-01	347301000