Quarter	Persons, Seasonally Adjusted
2005-01-01	163024000
2005-04-01	163713000
2005-07-01	164402000
2005-10-01	164851000
2006-01-01	165842000
2006-04-01	166623000
2006-07-01	167409000
2006-10-01	168194000
2007-01-01	168671000
2007-04-01	169201000
2007-07-01	169619000
2007-10-01	170425000
2008-01-01	170908000
2008-04-01	171204000
2008-07-01	171221000
2008-10-01	171075000
2009-01-01	170175000
2009-04-01	169560000
2009-07-01	169665000
2009-10-01	169643000
2010-01-01	169276000
2010-04-01	169423000
2010-07-01	169241000
2010-10-01	169192000
2011-01-01	169714000
2011-04-01	169806000
2011-07-01	169792000
2011-10-01	170324000
2012-01-01	170627000
2012-04-01	171215000
2012-07-01	171349000
2012-10-01	171356000
2013-01-01	171326000
2013-04-01	171885000
2013-07-01	172262000
2013-10-01	172441000
2014-01-01	173238000
2014-04-01	173086000
2014-07-01	173291000
2014-10-01	174028000
2015-01-01	174351000
2015-04-01	174799000
2015-07-01	175108000
2015-10-01	175926000
2016-01-01	176615000
2016-04-01	176852000
2016-07-01	177687000
2016-10-01	177871000
2017-01-01	178269000
2017-04-01	178937000