Quarter	Percent, Seasonally Adjusted
1999-01-01	59.3970980305301
1999-04-01	60.0708698871308
1999-07-01	59.3942456034881
1999-10-01	59.8809522893314
2000-01-01	59.4773702294046
2000-04-01	59.4191600997428
2000-07-01	60.7218026152288
2000-10-01	60.5554313518333
2001-01-01	61.2992751121599
2001-04-01	61.0961600561993
2001-07-01	61.8310089736039
2001-10-01	60.5138589815396
2002-01-01	62.0975434337419
2002-04-01	60.9953774830587
2002-07-01	59.1713772472396
2002-10-01	59.1411940452123
2003-01-01	59.4437685046563
2003-04-01	59.2457808696546
2003-07-01	58.5220974344088
2003-10-01	60.5552096344961
2004-01-01	61.5077421446874
2004-04-01	61.7011628591639
2004-07-01	62.6166982969296
2004-10-01	62.1717393707377
2005-01-01	62.2329479565666
2005-04-01	61.6974004350517
2005-07-01	61.7879275347710
2005-10-01	62.2273957843386
2006-01-01	62.6661466660037
2006-04-01	62.3011335261317
2006-07-01	62.5370404756696
2006-10-01	62.3028101799153
2007-01-01	63.1296990029831
2007-04-01	64.2932432300066
2007-07-01	64.0139626678334
2007-10-01	63.5419634057206
2008-01-01	62.8493970965726
2008-04-01	63.0125716407212
2008-07-01	63.5639802288186
2008-10-01	62.6134409002667
2009-01-01	61.0839260125248
2009-04-01	61.8094372160380
2009-07-01	61.7247446932325
2009-10-01	61.7532687870802
2010-01-01	61.2936913355508
2010-04-01	60.0750207754275
2010-07-01	60.1015494371066
2010-10-01	60.2735661874391
2011-01-01	59.1940773395506
2011-04-01	58.5731227782672
2011-07-01	58.1756930630749
2011-10-01	58.1084092522020
2012-01-01	58.2333541633445
2012-04-01	57.5751846131617
2012-07-01	57.2813181890698
2012-10-01	57.9131636215940
2013-01-01	56.9731544946624
2013-04-01	56.7485771559038
2013-07-01	57.3827737855262
2013-10-01	57.4548368803673
2014-01-01	57.1741150953558
2014-04-01	58.0437981946671
2014-07-01	57.4987701836423
2014-10-01	57.9011075199678
2015-01-01	57.9541485969528
2015-04-01	57.9585395275441
2015-07-01	58.3215472251154
2015-10-01	57.1537613720464
2016-01-01	56.6195017231022
2016-04-01	56.8723691996092
2016-07-01	56.5655147910244
2016-10-01	56.8705529355887
2017-01-01	58.8124823488777
2017-04-01	59.5707438979875
2017-07-01	59.7319685661250
2017-10-01	59.9886973857074
2018-01-01	60.7415611632164
2018-04-01	61.2269125504401