Quarter	Percent, Seasonally Adjusted
1999-01-01	46.6840904606552
1999-04-01	47.1770247039991
1999-07-01	47.7062735755905
1999-10-01	48.2776936666459
2000-01-01	48.8666288686700
2000-04-01	49.3868267181550
2000-07-01	49.7810919591621
2000-10-01	50.2260195604223
2001-01-01	50.5601804786834
2001-04-01	50.6950694829684
2001-07-01	51.0458726337746
2001-10-01	51.2491553372273
2002-01-01	51.7041791819365
2002-04-01	52.0455928732606
2002-07-01	52.1605306261703
2002-10-01	52.4203946217492
2003-01-01	52.7452953011120
2003-04-01	53.1929786086268
2003-07-01	53.5228781103044
2003-10-01	53.8488895536026
2004-01-01	54.0337483573262
2004-04-01	54.1987438078124
2004-07-01	54.6382577915966
2004-10-01	55.2980463224758
2005-01-01	55.9164048024324
2005-04-01	56.5611096364105
2005-07-01	56.9769940463059
2005-10-01	57.3846772878946
2006-01-01	57.7957346828552
2006-04-01	58.0889449009735
2006-07-01	58.2418094500777
2006-10-01	58.6995616943928
2007-01-01	58.9767897259245
2007-04-01	59.2247733651903
2007-07-01	59.2058860856783
2007-10-01	59.2135395575529
2008-01-01	59.1324285809710
2008-04-01	58.5571119566782
2008-07-01	57.7890522327130
2008-10-01	56.7041832323508
2009-01-01	54.8846217345110
2009-04-01	54.0804010851060
2009-07-01	53.5793880318103
2009-10-01	53.3569712945463
2010-01-01	53.1870938270479
2010-04-01	52.9616859067532
2010-07-01	52.8421735079109
2010-10-01	52.7533165333751
2011-01-01	52.5422835012068
2011-04-01	52.6089789586353
2011-07-01	51.8970095313434
2011-10-01	51.3349600475025
2012-01-01	50.7686045382380
2012-04-01	50.2133824350738
2012-07-01	49.7357896131683
2012-10-01	49.2452783110042
2013-01-01	48.9440685544238
2013-04-01	48.7832209223124
2013-07-01	48.8198652757855
2013-10-01	48.9844256715509
2014-01-01	49.0323432688760
2014-04-01	49.4723177397189
2014-07-01	49.5962599628297
2014-10-01	50.1215533024834
2015-01-01	50.3267903657933
2015-04-01	50.9924562979340
2015-07-01	51.2145933622763
2015-10-01	51.8164716859830
2016-01-01	52.1824389990307
2016-04-01	52.3345936673079
2016-07-01	52.6191918200911
2016-10-01	52.9243285707294
2017-01-01	53.1945571321830
2017-04-01	53.5639911198365
2017-07-01	53.8869600098810
2017-10-01	54.1425134437135
2018-01-01	54.2682124784450
2018-04-01	54.8649852676677
2018-07-01	54.9932540015733