Quarter	Percent, Seasonally Adjusted
1999-01-01	48.6407237704631
1999-04-01	48.8937332038065
1999-07-01	49.1956323027046
1999-10-01	49.3317881765913
2000-01-01	49.5578566405530
2000-04-01	49.5818742722372
2000-07-01	49.7091681267763
2000-10-01	50.1263974558065
2001-01-01	50.0080415162000
2001-04-01	49.6707064037367
2001-07-01	49.7831811809246
2001-10-01	49.5913205999743
2002-01-01	49.7810268866120
2002-04-01	49.8758694075253
2002-07-01	49.7429837126901
2002-10-01	49.9322510516374
2003-01-01	50.3855526446169
2003-04-01	50.9557445122028
2003-07-01	51.0426063751620
2003-10-01	51.2014354182293
2004-01-01	50.9413234692652
2004-04-01	50.5219394380964
2004-07-01	50.4676356566228
2004-10-01	50.8259567596334
2005-01-01	50.8670425419919
2005-04-01	50.9952637861796
2005-07-01	51.0925843194426
2005-10-01	50.9749470363906
2006-01-01	51.3611835934027
2006-04-01	51.1116493623545
2006-07-01	50.8588286533260
2006-10-01	50.9486563340516
2007-01-01	51.0001010334762
2007-04-01	50.7734182822998
2007-07-01	50.4939247267546
2007-10-01	50.4145086637810
2008-01-01	50.1532811700863
2008-04-01	50.0159260795223
2008-07-01	50.5223111274242
2008-10-01	50.5978794254843
2009-01-01	49.7685181528298
2009-04-01	49.6314958441414
2009-07-01	49.3586425812014
2009-10-01	49.6291437042735
2010-01-01	50.1520424438975
2010-04-01	50.2255999972774
2010-07-01	50.3371141088285
2010-10-01	50.1916467809350
2011-01-01	50.0627754366928
2011-04-01	50.2976799237709
2011-07-01	50.3600553513445
2011-10-01	50.6060609524215
2012-01-01	50.9462240531183
2012-04-01	51.8554751082244
2012-07-01	52.4824247105332
2012-10-01	52.1383281152255
2013-01-01	51.9697787836889
2013-04-01	52.3417760132492
2013-07-01	52.6405691032779
2013-10-01	53.5030914620070
2014-01-01	55.2559450001457
2014-04-01	55.4894537273553
2014-07-01	56.1676240506776
2014-10-01	56.6423956777385
2015-01-01	57.0819291760128
2015-04-01	57.5852316855718
2015-07-01	58.1711098382233
2015-10-01	58.3369788167130
2016-01-01	59.1917824689030
2016-04-01	60.0794060990831
2016-07-01	60.5525758138750
2016-10-01	61.0593077748671
2017-01-01	60.9850874122778
2017-04-01	61.1358776276061
2017-07-01	61.3669928965439
2017-10-01	61.5475906915161
2018-01-01	62.0560719086870
2018-04-01	62.5302501474149