Quarter	Percent, Seasonally Adjusted
1999-01-01	57.0255444850614
1999-04-01	56.7988499734979
1999-07-01	56.9964203904759
1999-10-01	57.4100151605108
2000-01-01	57.8703226280988
2000-04-01	58.4183645829957
2000-07-01	58.0399022629211
2000-10-01	57.6333768886961
2001-01-01	57.6473306260841
2001-04-01	57.3202473723283
2001-07-01	57.6341399175706
2001-10-01	56.6517817188703
2002-01-01	57.0701399887858
2002-04-01	56.8345937259416
2002-07-01	56.7956050660914
2002-10-01	56.4275644576770
2003-01-01	55.4612454609947
2003-04-01	56.0423201844043
2003-07-01	55.7737529080790
2003-10-01	56.2893747134158
2004-01-01	56.3722470478467
2004-04-01	56.6143025137929
2004-07-01	56.9496541301616
2004-10-01	56.2134820608437
2005-01-01	56.8484952450897
2005-04-01	56.3928554322452
2005-07-01	56.8503130144216
2005-10-01	56.7755848898187
2006-01-01	55.9367265473726
2006-04-01	55.9170337143422
2006-07-01	56.2529048958785
2006-10-01	57.3098068656307
2007-01-01	57.3906014914112
2007-04-01	56.9738956745630
2007-07-01	56.7997032891505
2007-10-01	56.9013632517611
2008-01-01	57.2021441342331
2008-04-01	56.9164314902102
2008-07-01	56.7782160158222
2008-10-01	56.7485155847250
2009-01-01	56.1175131834716
2009-04-01	55.4128594189163
2009-07-01	55.5798584935020
2009-10-01	55.6865714258089
2010-01-01	55.7455121974519
2010-04-01	55.8645517859394
2010-07-01	55.9181369296107
2010-10-01	55.9344039091431
2011-01-01	55.2731214546120
2011-04-01	55.9018547197612
2011-07-01	54.9356192919475
2011-10-01	55.7758298259678
2012-01-01	55.6102184417782
2012-04-01	55.5649275229239
2012-07-01	55.1799236227629
2012-10-01	54.3246272798872
2013-01-01	54.4057791243935
2013-04-01	55.1929260566507
2013-07-01	54.3121477784756
2013-10-01	54.1301782256070
2014-01-01	54.0770523140768
2014-04-01	53.6733521089327
2014-07-01	53.7155117275165
2014-10-01	54.0705013979569
2015-01-01	53.9337645088909
2015-04-01	53.1841887212778
2015-07-01	53.8729965670107
2015-10-01	53.1415539450817
2016-01-01	53.4369062690644
2016-04-01	54.0331629619070
2016-07-01	54.1005631340099
2016-10-01	54.3986552348951
2017-01-01	54.6590961266435
2017-04-01	54.6811502399318
2017-07-01	54.9833131433242
2017-10-01	55.4995579536836
2018-01-01	55.3273988318367
2018-04-01	55.0953901723408