Quarter	Percent, Seasonally Adjusted
1999-01-01	61.2970145266544
1999-04-01	61.4010766989009
1999-07-01	61.0403440803708
1999-10-01	61.0150469506399
2000-01-01	60.3167880994780
2000-04-01	59.2608117275836
2000-07-01	58.6830121473517
2000-10-01	58.2419192145284
2001-01-01	58.4878472197307
2001-04-01	58.3078969111953
2001-07-01	57.9393570327770
2001-10-01	57.7241207425765
2002-01-01	57.5133294665976
2002-04-01	57.0702901591390
2002-07-01	56.9351098086627
2002-10-01	56.4388867742075
2003-01-01	56.4237522482538
2003-04-01	56.1245200956666
2003-07-01	55.8159923525392
2003-10-01	55.6585976226397
2004-01-01	55.6820712333524
2004-04-01	55.7647143801537
2004-07-01	55.4663359372926
2004-10-01	55.3016038843330
2005-01-01	54.5449094174294
2005-04-01	53.9627442015099
2005-07-01	54.2566802262670
2005-10-01	53.3207434769161
2006-01-01	52.9717515457303
2006-04-01	53.2365691003065
2006-07-01	53.4627601607688
2006-10-01	53.1057830598307
2007-01-01	53.1473039595972
2007-04-01	52.6528058771803
2007-07-01	52.6415937974553
2007-10-01	52.1331122272408
2008-01-01	51.5861301351505
2008-04-01	51.0483954618236
2008-07-01	50.8877968406618
2008-10-01	50.1568013472624
2009-01-01	50.0574285056553
2009-04-01	49.5737092012166
2009-07-01	50.2755885735479
2009-10-01	50.0581181128610
2010-01-01	49.7150013577935
2010-04-01	49.6174639932765
2010-07-01	48.9899743541284
2010-10-01	48.6852783957236
2011-01-01	48.2316461964137
2011-04-01	47.6712966898728
2011-07-01	47.4428645001702
2011-10-01	47.0368580790117
2012-01-01	47.0741672299638
2012-04-01	46.2453687555262
2012-07-01	46.1835851629760
2012-10-01	46.4570731164030
2013-01-01	46.3319137336290
2013-04-01	46.2021740068462
2013-07-01	45.6836744925463
2013-10-01	45.5165629324384
2014-01-01	45.5185786602058
2014-04-01	44.7373836650040
2014-07-01	44.5560189641708
2014-10-01	43.6344749360411
2015-01-01	43.3144610956831
2015-04-01	42.5992733745100
2015-07-01	42.2552802040903
2015-10-01	41.3126396952065
2016-01-01	40.8891611898642
2016-04-01	41.1378745738775
2016-07-01	40.5852358101920
2016-10-01	40.7503600149429
2017-01-01	40.7296038003965
2017-04-01	40.3193923240538
2017-07-01	40.3175576756781
2017-10-01	40.0719211929940
2018-01-01	39.8850738928349
2018-04-01	39.6229113036196
2018-07-01	39.7202200308850