Quarter	Percent, Seasonally Adjusted
1999-01-01	62.1559398555273
1999-04-01	61.9216440671808
1999-07-01	61.9684489613798
1999-10-01	61.7876690205035
2000-01-01	62.0761855580604
2000-04-01	61.7922361491682
2000-07-01	62.0308998208476
2000-10-01	62.1690188566815
2001-01-01	61.9787100216479
2001-04-01	62.6196671123472
2001-07-01	62.4414772825704
2001-10-01	63.0732750292434
2002-01-01	63.6778743777988
2002-04-01	63.5067063947564
2002-07-01	63.7671368839486
2002-10-01	64.0184532793244
2003-01-01	63.8749401220024
2003-04-01	64.5857507042268
2003-07-01	64.4302784327855
2003-10-01	64.2587458143959
2004-01-01	62.9529608188344
2004-04-01	63.2161287268694
2004-07-01	63.6938550631191
2004-10-01	64.1439437807112
2005-01-01	64.4034476095732
2005-04-01	64.7337381085267
2005-07-01	65.2148609092535
2005-10-01	65.2629044490960
2006-01-01	65.4580051741154
2006-04-01	65.9008268942154
2006-07-01	66.0567489827077
2006-10-01	66.4311073638899
2007-01-01	66.7260894462120
2007-04-01	66.9255577281912
2007-07-01	67.4404613337436
2007-10-01	67.2657395803382
2008-01-01	67.5260392695167
2008-04-01	67.6360495188740
2008-07-01	67.7334525988926
2008-10-01	68.4496248079845
2009-01-01	68.5174674664870
2009-04-01	68.8473437642401
2009-07-01	68.9914984349376
2009-10-01	68.6005479608827
2010-01-01	68.7059057424149
2010-04-01	68.8369926911209
2010-07-01	68.9189782599503
2010-10-01	69.1331398416162
2011-01-01	69.2476072175918
2011-04-01	69.0861920210968
2011-07-01	69.1058298934321
2011-10-01	69.6340369081142
2012-01-01	69.7857324936282
2012-04-01	69.9201513002688
2012-07-01	70.2485547172294
2012-10-01	70.2397074366563
2013-01-01	70.3994321796066
2013-04-01	70.6495341767382
2013-07-01	70.8697341185742
2013-10-01	70.6838316089984
2014-01-01	71.0243995258102
2014-04-01	71.1205173048420
2014-07-01	70.3677785182744
2014-10-01	70.7060923517902
2015-01-01	70.6021979981378
2015-04-01	70.8205691238892
2015-07-01	70.9337205746829
2015-10-01	71.2483894766729
2016-01-01	71.4777674843843
2016-04-01	71.6521729828297
2016-07-01	71.9415435118910
2016-10-01	71.6695566699986
2017-01-01	71.7546960655134
2017-04-01	71.8964599762062
2017-07-01	71.6874718693894
2017-10-01	71.9869172513062
2018-01-01	71.9157429970793
2018-04-01	71.7805451137136