Quarter	Percent, Seasonally Adjusted
1998-01-01	55.5979614978763
1998-04-01	55.8276441126882
1998-07-01	56.1376864122985
1998-10-01	56.2401852818858
1999-01-01	56.3573303516728
1999-04-01	55.7741974851864
1999-07-01	55.7070396264701
1999-10-01	55.7604559445151
2000-01-01	56.0226082559551
2000-04-01	56.3150790311079
2000-07-01	56.5700858044791
2000-10-01	56.9120579049420
2001-01-01	56.4863926190372
2001-04-01	56.2386807895089
2001-07-01	56.4687712882083
2001-10-01	56.2216414706390
2002-01-01	56.5559301322904
2002-04-01	57.3450908634943
2002-07-01	57.6653769889392
2002-10-01	58.0027678592488
2003-01-01	58.2580506253780
2003-04-01	58.4047099646099
2003-07-01	58.5925020182788
2003-10-01	58.6706247036337
2004-01-01	58.7985770739951
2004-04-01	59.0701088198781
2004-07-01	59.0465584468212
2004-10-01	59.3467157052178
2005-01-01	59.4700488905190
2005-04-01	59.5849237150349
2005-07-01	59.4896712157278
2005-10-01	59.9795020157012
2006-01-01	60.4057620226408
2006-04-01	60.4108055830002
2006-07-01	60.7508095625369
2006-10-01	60.7055867033034
2007-01-01	60.6834329660444
2007-04-01	60.7376106592867
2007-07-01	60.9154570741116
2007-10-01	61.1183116891584
2008-01-01	61.2237392938380
2008-04-01	61.5395657116934
2008-07-01	61.4094110875647
2008-10-01	61.4427050928044
2009-01-01	61.0745610468729
2009-04-01	60.9508901992788
2009-07-01	60.8646688361057
2009-10-01	60.4636348988125
2010-01-01	60.0805572561261
2010-04-01	59.4336500278472
2010-07-01	58.8080574046468
2010-10-01	57.9906724249149
2011-01-01	56.9039586882633
2011-04-01	55.7324964233118
2011-07-01	54.5015025901094
2011-10-01	53.1662930007269
2012-01-01	52.3386348069110
2012-04-01	50.9565159777851
2012-07-01	50.0450319576317
2012-10-01	49.8828485710130
2013-01-01	49.2103696583810
2013-04-01	48.7929885697601
2013-07-01	48.5452815876970
2013-10-01	48.5944595738115
2014-01-01	49.2844354256244
2014-04-01	49.1001896590303
2014-07-01	49.5337451597127
2014-10-01	49.7734873796461
2015-01-01	49.9774338855133
2015-04-01	50.5843150636377
2015-07-01	50.9605482376071
2015-10-01	51.5960721180247
2016-01-01	51.7400465738004
2016-04-01	51.9452947942447
2016-07-01	52.2749688644340
2016-10-01	52.2273334893392
2017-01-01	52.8562645819405
2017-04-01	53.4647558358390
2017-07-01	53.7968872419332
2017-10-01	53.8209372132158
2018-01-01	54.1502220623591
2018-04-01	54.8097587328663