Quarter	Thousands of Persons, Seasonally Adjusted
2000-01-01	16719.35
2000-04-01	17041.41
2000-07-01	16929.66
2000-10-01	17027.22
2001-01-01	17157.90
2001-04-01	16957.61
2001-07-01	17118.14
2001-10-01	16936.10
2002-01-01	16744.02
2002-04-01	17098.95
2002-07-01	17160.19
2002-10-01	17270.11
2003-01-01	17185.46
2003-04-01	17097.02
2003-07-01	17142.77
2003-10-01	16997.74
2004-01-01	17722.05
2004-04-01	17821.77
2004-07-01	17801.08
2004-10-01	17979.09
2005-01-01	16563.04
2005-04-01	16704.09
2005-07-01	16735.65
2005-10-01	16792.83
2006-01-01	16629.24
2006-04-01	16800.11
2006-07-01	16857.57
2006-10-01	17025.89
2007-01-01	16953.21
2007-04-01	17086.74
2007-07-01	17179.79
2007-10-01	17159.71
2008-01-01	17219.43
2008-04-01	17426.55
2008-07-01	17522.91
2008-10-01	17702.62
2009-01-01	17755.45
2009-04-01	17769.04
2009-07-01	17974.66
2009-10-01	18097.33
2010-01-01	18218.02
2010-04-01	18240.59
2010-07-01	18234.34
2010-10-01	18357.67
2011-01-01	18732.63
2011-04-01	18813.15
2011-07-01	18909.78
2011-10-01	18996.93