Quarterly Persons
2003-04-01 17629000
2004-04-01 18486000
2005-01-01 19316000
2005-04-01 19621000
2005-07-01 19737000
2005-10-01 20094000
2006-01-01 20208000
2006-04-01 20573000
2006-07-01 20856000
2006-10-01 21181000
2007-01-01 21170000
2007-04-01 21519000
2007-07-01 21621000
2007-10-01 21952000
2008-01-01 21932000
2008-04-01 22265000
2008-07-01 22150000
2008-10-01 22575000
2009-01-01 22486000
2009-04-01 22850000
2009-07-01 22684000
2009-10-01 22912000
2010-01-01 23147000
2010-04-01 23441000
2010-07-01 23540000
2010-10-01 23676000
2011-01-01 23931000
2011-04-01 24150000
2011-07-01 24122000
2011-10-01 24420000
2012-01-01 24868000
2012-04-01 24996000
2012-07-01 24867000
2012-10-01 25321000
2013-01-01 25519000
2013-04-01 25619000
2013-07-01 25695000
2013-10-01 25930000
2014-01-01 26078000
2014-04-01 26439000
2014-07-01 26352000
2014-10-01 26772000
2015-01-01 26777000
2015-04-01 26967000
2015-07-01 27008000
2015-10-01 27408000
2016-01-01 27606000
2016-04-01 27752000
2016-07-01 27607000
2016-10-01 28101000
2017-01-01 28373000
2017-04-01 28554000