Quarter	Persons, Seasonally Adjusted
2005-01-01	176237000
2005-04-01	176804000
2005-07-01	177349000
2005-10-01	177662000
2006-01-01	178532000
2006-04-01	179074000
2006-07-01	179372000
2006-10-01	179835000
2007-01-01	180377000
2007-04-01	180823000
2007-07-01	180914000
2007-10-01	180998000
2008-01-01	180942000
2008-04-01	180543000
2008-07-01	179954000
2008-10-01	178598000
2009-01-01	176126000
2009-04-01	174252000
2009-07-01	173178000
2009-10-01	172735000
2010-01-01	172390000
2010-04-01	172881000
2010-07-01	173200000
2010-10-01	173286000
2011-01-01	173835000
2011-04-01	174016000
2011-07-01	173949000
2011-10-01	174398000
2012-01-01	174433000
2012-04-01	174732000
2012-07-01	174984000
2012-10-01	175134000
2013-01-01	174753000
2013-04-01	175039000
2013-07-01	175075000
2013-10-01	175358000
2014-01-01	176165000
2014-04-01	176659000
2014-07-01	177269000
2014-10-01	177494000
2015-01-01	177992000
2015-04-01	177945000
2015-07-01	178486000
2015-10-01	178973000
2016-01-01	180024000
2016-04-01	180233000
2016-07-01	180549000
2016-10-01	180936000
2017-01-01	181299000
2017-04-01	181647000