Quarter	Percent, Seasonally Adjusted
1998-01-01	58.5659623791150
1998-04-01	58.9759344409899
1998-07-01	59.1447174293147
1998-10-01	59.3864793637544
1999-01-01	59.4545106719570
1999-04-01	59.5650270354859
1999-07-01	59.6710191552312
1999-10-01	59.6312195994014
2000-01-01	59.7505836097932
2000-04-01	60.0120652982336
2000-07-01	60.3011300750476
2000-10-01	60.4923903563753
2001-01-01	60.5926475237433
2001-04-01	60.4200329540395
2001-07-01	60.7495731260670
2001-10-01	60.7351744652314
2002-01-01	60.9486881758935
2002-04-01	61.0759369192794
2002-07-01	61.2175388855657
2002-10-01	61.1602079251638
2003-01-01	61.3126132624409
2003-04-01	61.6008091469952
2003-07-01	61.7019910173519
2003-10-01	61.3990314170446
2004-01-01	62.7403553078239
2004-04-01	62.7429780983984
2004-07-01	62.8085086539653
2004-10-01	62.9340691418205
2005-01-01	62.6512850583844
2005-04-01	62.4319039332484
2005-07-01	62.1643531356300
2005-10-01	62.6227744377619
2006-01-01	62.8114134698745
2006-04-01	62.7647687790570
2006-07-01	62.4255969546542
2006-10-01	62.5409830846164
2007-01-01	62.0572601767788
2007-04-01	62.1872225837229
2007-07-01	62.7112947217184
2007-10-01	62.6614542573634
2008-01-01	62.9121652584568
2008-04-01	63.1801585750566
2008-07-01	62.9491282613796
2008-10-01	62.6213691178548
2009-01-01	62.4192357388902
2009-04-01	62.2829525510115
2009-07-01	62.2617567985725
2009-10-01	62.0804665207017
2010-01-01	62.1486179385890
2010-04-01	62.1429132353222
2010-07-01	61.7692321485407
2010-10-01	61.9950791427046
2011-01-01	61.9163815266981
2011-04-01	61.7639167660220
2011-07-01	62.0522553486672
2011-10-01	62.4826994546222
2012-01-01	63.2101454470349
2012-04-01	63.6305435851573
2012-07-01	63.5335031377168
2012-10-01	63.6157240901243
2013-01-01	63.4943171395485
2013-04-01	63.2387063347771
2013-07-01	63.2592678336804
2013-10-01	63.4193744350836
2014-01-01	63.7792100715208
2014-04-01	63.5995328027896
2014-07-01	64.0592266534622
2014-10-01	64.3198036725734
2015-01-01	63.9590470584493
2015-04-01	64.0661011967649
2015-07-01	63.9614027336887
2015-10-01	64.1639374125693
2016-01-01	64.3517291158075
2016-04-01	65.1164891279417
2016-07-01	65.0750158326068
2016-10-01	65.2221268476516
2017-01-01	65.4456633506450
2017-04-01	65.1896682949917
2017-07-01	65.6304670976617
2017-10-01	65.4686239999976
2018-01-01	65.6085096527540
2018-04-01	66.0434957287235