Quarter	Percent, Seasonally Adjusted
1999-07-01	48.5672593940512
1999-10-01	49.3000100017092
2000-01-01	49.5562867734061
2000-04-01	49.9028820225902
2000-07-01	50.3988166800093
2000-10-01	50.4173018315930
2001-01-01	50.3468233371956
2001-04-01	51.0474640077047
2001-07-01	51.1438239793261
2001-10-01	51.4816787017283
2002-01-01	51.8673183900135
2002-04-01	52.1592334623170
2002-07-01	52.0917602810092
2002-10-01	51.8965250460646
2003-01-01	51.0670221449644
2003-04-01	51.0391493354566
2003-07-01	51.2026076892518
2003-10-01	51.3358633454296
2004-01-01	52.2879526134395
2004-04-01	52.2668772727859
2004-07-01	52.3545335056500
2004-10-01	52.4624924258479
2005-01-01	52.3407895258737
2005-04-01	52.3723730446878
2005-07-01	52.7013821035604
2005-10-01	52.9300142064827
2006-01-01	53.2179060178758
2006-04-01	53.2422056636959
2006-07-01	53.0824162224791
2006-10-01	53.2732247336356
2007-01-01	53.4365164883290
2007-04-01	53.3412914647198
2007-07-01	53.2705546999666
2007-10-01	53.4422056064843
2008-01-01	53.5199311441652
2008-04-01	53.4701231265668
2008-07-01	53.1731063311017
2008-10-01	53.0751691508017
2009-01-01	52.5302190364077
2009-04-01	52.1030580018584
2009-07-01	52.3029028942644
2009-10-01	52.2330591885431
2010-01-01	52.4619534732557
2010-04-01	52.7982186147073
2010-07-01	52.7325302371698
2010-10-01	52.7436570720093
2011-01-01	52.8493627775191
2011-04-01	53.2725547310163
2011-07-01	53.0801725267848
2011-10-01	53.3702318663476
2012-01-01	53.4646470651481
2012-04-01	53.6730285950964
2012-07-01	53.5193261628237
2012-10-01	53.5366204401041
2013-01-01	53.4318430112211
2013-04-01	53.8545057226167
2013-07-01	54.2023598827760
2013-10-01	54.4511978739480
2014-01-01	54.8229179784755
2014-04-01	54.8620157770304
2014-07-01	55.1533974285276
2014-10-01	55.2112117410695
2015-01-01	55.4965737871391
2015-04-01	55.4767856800300
2015-07-01	55.8417082111718
2015-10-01	56.1290644679480
2016-01-01	56.0174683359993
2016-04-01	55.9888307635310
2016-07-01	56.2205740396977
2016-10-01	56.3119237793036
2017-01-01	56.6637157397782
2017-04-01	56.7674179237395
2017-07-01	56.9325998842289
2017-10-01	57.0554462034730
2018-01-01	57.0745142576543
2018-04-01	57.1407479897418
2018-07-01	57.0764278468491