Quarter	Percent, Seasonally Adjusted
1999-01-01	30.5212822734020
1999-04-01	30.7066701003412
1999-07-01	30.4648875996162
1999-10-01	30.3510899642069
2000-01-01	30.1691675691512
2000-04-01	30.2307012575841
2000-07-01	30.1414324058518
2000-10-01	29.9755799553631
2001-01-01	29.6822090282984
2001-04-01	29.4021681737506
2001-07-01	29.4950458227958
2001-10-01	29.6561822588700
2002-01-01	30.0427809991748
2002-04-01	30.2579177704750
2002-07-01	30.1988842481916
2002-10-01	30.0412474514740
2003-01-01	30.0939681631556
2003-04-01	29.9474838334300
2003-07-01	29.8284970312506
2003-10-01	30.0135228501230
2004-01-01	30.2247939132278
2004-04-01	30.1113260967238
2004-07-01	30.2765165009973
2004-10-01	30.6078164770868
2005-01-01	30.7880093712967
2005-04-01	31.1485845258606
2005-07-01	31.2795371353484
2005-10-01	31.0292346542329
2006-01-01	31.2444052928728
2006-04-01	31.2521101307660
2006-07-01	31.3528241461550
2006-10-01	31.6245371714047
2007-01-01	31.7507228015364
2007-04-01	31.8251359286979
2007-07-01	31.7320611166564
2007-10-01	31.4230678452503
2008-01-01	31.2350721785634
2008-04-01	31.2092801222010
2008-07-01	30.9766974907016
2008-10-01	31.2378532214956
2009-01-01	31.6650177815415
2009-04-01	31.6491136047089
2009-07-01	31.5284088036308
2009-10-01	31.4623090081972
2010-01-01	31.5261004280326
2010-04-01	31.3342136178077
2010-07-01	31.2742366003822
2010-10-01	31.1871948728392
2011-01-01	31.5210691724392
2011-04-01	31.3387921109709
2011-07-01	31.2811794663738
2011-10-01	30.9783522155545
2012-01-01	30.6826883340952
2012-04-01	30.5907384213390
2012-07-01	30.4393252822525
2012-10-01	30.5468260149057
2013-01-01	30.0686324224973
2013-04-01	30.2200699963158
2013-07-01	30.1603482247892
2013-10-01	30.1378923062938
2014-01-01	30.0325618212153
2014-04-01	29.8740548474409
2014-07-01	29.6565431349857
2014-10-01	29.3817047106462
2015-01-01	29.3480488731577
2015-04-01	29.3806873171548
2015-07-01	28.9917407243572
2015-10-01	28.6194174118892
2016-01-01	28.4907235656331
2016-04-01	28.0808067698258
2016-07-01	28.0188076695054
2016-10-01	27.9804396280522
2017-01-01	27.9460343218098
2017-04-01	27.9596829223008
2017-07-01	27.8328384028705
2017-10-01	27.8776919968714
2018-01-01	27.8139229723778
2018-04-01	27.9600850346637