Quarter	Percent, Seasonally Adjusted
1999-01-01	51.9788490799702
1999-04-01	51.8948895700829
1999-07-01	52.2136117799221
1999-10-01	52.1430126760421
2000-01-01	52.6734581800424
2000-04-01	53.5662034531358
2000-07-01	53.4143858997344
2000-10-01	52.7880925059510
2001-01-01	52.8750336584744
2001-04-01	52.5743203164392
2001-07-01	52.8607587223106
2001-10-01	52.1771761811915
2002-01-01	52.4896878435376
2002-04-01	52.5091327413408
2002-07-01	52.8062384726858
2002-10-01	52.6430518374916
2003-01-01	52.0585698357119
2003-04-01	52.2838434635155
2003-07-01	52.2751974595797
2003-10-01	53.0340901028855
2004-01-01	52.8635927269194
2004-04-01	53.3624542721074
2004-07-01	52.9926466689446
2004-10-01	53.2419600696228
2005-01-01	53.9314311853968
2005-04-01	53.8768349825598
2005-07-01	53.8875509962016
2005-10-01	53.8726791811608
2006-01-01	53.4871501006209
2006-04-01	53.6330086936178
2006-07-01	54.0168724200989
2006-10-01	54.9306001969956
2007-01-01	54.9950536585903
2007-04-01	54.8694153060944
2007-07-01	55.0512097019708
2007-10-01	55.6514396242036
2008-01-01	55.8603383871064
2008-04-01	55.3386725826572
2008-07-01	55.7078968035721
2008-10-01	55.3767742964072
2009-01-01	55.1780077782237
2009-04-01	54.7899720248633
2009-07-01	54.6923673012801
2009-10-01	54.9429515598494
2010-01-01	55.3238887361001
2010-04-01	54.8884540728560
2010-07-01	55.1368314707773
2010-10-01	55.7804450448506
2011-01-01	54.7625105997711
2011-04-01	55.7113189968598
2011-07-01	54.8411997090649
2011-10-01	55.2161463717991
2012-01-01	54.9242018376376
2012-04-01	55.0003297909619
2012-07-01	55.0792768204673
2012-10-01	54.8606076415618
2013-01-01	54.5593291673327
2013-04-01	55.0093500145821
2013-07-01	55.0805398541808
2013-10-01	54.5037280552526
2014-01-01	54.6078600800766
2014-04-01	54.8566499813314
2014-07-01	54.8408753131516
2014-10-01	54.8595137665164
2015-01-01	54.9566561344724
2015-04-01	54.2706904965488
2015-07-01	54.7205976089139
2015-10-01	54.3952715401837
2016-01-01	54.3639359539387
2016-04-01	54.4883009016754
2016-07-01	54.6004394550235
2016-10-01	55.5881646512117
2017-01-01	54.8176325803463
2017-04-01	55.1851491025469
2017-07-01	55.4866000719537
2017-10-01	56.0187620395796
2018-01-01	56.1225311317653
2018-04-01	55.8298493834318