Quarter	Percent, Seasonally Adjusted
1999-01-01	51.2460461856788
1999-04-01	51.1254567016521
1999-07-01	50.9358457648727
1999-10-01	50.9781672706380
2000-01-01	51.6504064372754
2000-04-01	51.2890217457777
2000-07-01	52.2117539610989
2000-10-01	52.1196478236759
2001-01-01	52.4042400134007
2001-04-01	51.8252329737360
2001-07-01	52.5281526213837
2001-10-01	52.1772760816928
2002-01-01	52.6844480184165
2002-04-01	52.7802015938760
2002-07-01	51.8614429428777
2002-10-01	51.0402616693696
2003-01-01	51.1767888485898
2003-04-01	50.8119505387788
2003-07-01	50.1055075785816
2003-10-01	51.6636965534800
2004-01-01	52.8841898698240
2004-04-01	53.6187744694608
2004-07-01	54.3184040781349
2004-10-01	52.9019342528704
2005-01-01	53.5973157685519
2005-04-01	53.7173812448304
2005-07-01	54.3561937641286
2005-10-01	54.5431307046041
2006-01-01	54.0691570969018
2006-04-01	55.4842712084823
2006-07-01	54.2628797628756
2006-10-01	54.1574232651259
2007-01-01	54.5596493835655
2007-04-01	55.7808210341663
2007-07-01	55.9404513060275
2007-10-01	55.2979479859483
2008-01-01	55.8152633181884
2008-04-01	55.9048224855431
2008-07-01	57.1171238060237
2008-10-01	57.2934794072187
2009-01-01	56.4629777914433
2009-04-01	55.9638304620711
2009-07-01	56.4010623582713
2009-10-01	56.0275743210658
2010-01-01	55.7818756576016
2010-04-01	55.6246713765436
2010-07-01	54.1472527931211
2010-10-01	55.2024524435465
2011-01-01	53.5367810424024
2011-04-01	53.5307536531442
2011-07-01	53.7595129517390
2011-10-01	53.9591034494362
2012-01-01	54.9148034606795
2012-04-01	52.7430165620989
2012-07-01	52.4613320051360
2012-10-01	52.9399944886820
2013-01-01	51.3796439284078
2013-04-01	51.8494709691772
2013-07-01	52.5803351182076
2013-10-01	52.0950031106436
2014-01-01	52.7249366080826
2014-04-01	53.5844969932319
2014-07-01	52.5324694961177
2014-10-01	52.3586858093070
2015-01-01	52.0981528516339
2015-04-01	53.0311032702311
2015-07-01	53.4292151967851
2015-10-01	53.3778173218447
2016-01-01	53.2206679191833
2016-04-01	54.1151706426320
2016-07-01	53.9864240715878
2016-10-01	55.3052230166704
2017-01-01	56.2551205908662
2017-04-01	55.7003375322092
2017-07-01	57.0693199438355
2017-10-01	58.3151664426131
2018-01-01	58.1545905916848
2018-04-01	58.0177148872156