Quarter	Percent, Seasonally Adjusted
1999-04-01	54.0007065110885
1999-07-01	54.2039771262876
1999-10-01	54.3474030051243
2000-01-01	54.3645572804719
2000-04-01	54.3987220564000
2000-07-01	54.7454340114171
2000-10-01	54.4444927903729
2001-01-01	54.2943243340604
2001-04-01	54.2783653005167
2001-07-01	54.3326237637311
2001-10-01	54.5445918157598
2002-01-01	54.3997561546510
2002-04-01	54.8331779643619
2002-07-01	54.8110400505317
2002-10-01	54.8018434422467
2003-01-01	54.6208209592515
2003-04-01	54.7368532869818
2003-07-01	54.7103059317511
2003-10-01	54.9111908760638
2004-01-01	55.0739791712037
2004-04-01	55.1073760133785
2004-07-01	54.8401551615153
2004-10-01	55.0774763785076
2005-01-01	55.4671949082596
2005-04-01	55.3140182788863
2005-07-01	55.3915916059917
2005-10-01	55.4093360798109
2006-01-01	55.8796275746238
2006-04-01	56.0166012154240
2006-07-01	55.8849406937996
2006-10-01	55.8077766136013
2007-01-01	55.6123683749178
2007-04-01	55.5792023826493
2007-07-01	55.6916440470243
2007-10-01	55.8599952434105
2008-01-01	55.8989566682220
2008-04-01	55.9747585960573
2008-07-01	55.9957264812369
2008-10-01	56.0126781447276
2009-01-01	56.1458903306454
2009-04-01	56.0836485769403
2009-07-01	56.1539724764467
2009-10-01	56.2134863253639
2010-01-01	55.9665645167769
2010-04-01	56.0839475079262
2010-07-01	56.2468332717191
2010-10-01	55.9730043548772
2011-01-01	56.2638885967948
2011-04-01	56.1671544915869
2011-07-01	56.1342631793797
2011-10-01	56.2482037337192
2012-01-01	56.1767265070519
2012-04-01	56.2152401915987
2012-07-01	56.4400332736446
2012-10-01	56.8050289302801
2013-01-01	56.7451888611234
2013-04-01	56.6731436198762
2013-07-01	56.7973900508241
2013-10-01	56.8387623889687
2014-01-01	56.9346434945276
2014-04-01	57.0467135254060
2014-07-01	57.0612631379553
2014-10-01	57.0554735322959
2015-01-01	57.2083286936607
2015-04-01	57.1797072574505
2015-07-01	57.2256323149800
2015-10-01	57.1768387736616
2016-01-01	57.1978257209984
2016-04-01	57.5463525732540
2016-07-01	57.5402371723563
2016-10-01	57.6305886011831
2017-01-01	57.6527784409756
2017-04-01	57.7664507926654
2017-07-01	57.7334199725736
2017-10-01	57.8801428311420
2018-01-01	58.1031320582611
2018-04-01	58.0092629169129