Quarter	Persons, Seasonally Adjusted
2005-01-01	19369000
2005-04-01	19586000
2005-07-01	19790000
2005-10-01	20016000
2006-01-01	20266000
2006-04-01	20532000
2006-07-01	20915000
2006-10-01	21106000
2007-01-01	21254000
2007-04-01	21433000
2007-07-01	21711000
2007-10-01	21876000
2008-01-01	21993000
2008-04-01	22185000
2008-07-01	22236000
2008-10-01	22509000
2009-01-01	22538000
2009-04-01	22763000
2009-07-01	22800000
2009-10-01	22851000
2010-01-01	23156000
2010-04-01	23383000
2010-07-01	23649000
2010-10-01	23637000
2011-01-01	23897000
2011-04-01	24115000
2011-07-01	24233000
2011-10-01	24386000
2012-01-01	24818000
2012-04-01	24974000
2012-07-01	24975000
2012-10-01	25281000
2013-01-01	25466000
2013-04-01	25595000
2013-07-01	25829000
2013-10-01	25857000
2014-01-01	26051000
2014-04-01	26394000
2014-07-01	26505000
2014-10-01	26695000
2015-01-01	26734000
2015-04-01	26946000
2015-07-01	27133000
2015-10-01	27357000
2016-01-01	27566000
2016-04-01	27689000
2016-07-01	27782000
2016-10-01	28019000
2017-01-01	28341000
2017-04-01	28501000