Quarter	Percent, Seasonally Adjusted
1999-01-01	53.6344607507947
1999-04-01	54.2831502554403
1999-07-01	54.9932905306498
1999-10-01	55.1624280181350
2000-01-01	55.8379094499920
2000-04-01	54.6038895951420
2000-07-01	56.1151230970836
2000-10-01	56.2231768633461
2001-01-01	54.9657266925496
2001-04-01	56.5900223503766
2001-07-01	58.5434010603328
2001-10-01	61.8428472088542
2002-01-01	57.9004549236544
2002-04-01	57.2958080078161
2002-07-01	58.8080176232376
2002-10-01	57.4980683326711
2003-01-01	59.4536247336155
2003-04-01	60.3315022480217
2003-07-01	61.7842848628825
2003-10-01	59.2520959614060
2004-01-01	59.2220390111015
2004-04-01	61.4761907835421
2004-07-01	61.2539724237447
2004-10-01	59.3371328502335
2005-01-01	59.9616075103866
2005-04-01	59.4794791837869
2005-07-01	58.8143163436764
2005-10-01	59.8135515163097
2006-01-01	60.1992442007819
2006-04-01	60.6909975018753
2006-07-01	60.7862502571655
2006-10-01	61.1125646530686
2007-01-01	59.5852506149687
2007-04-01	59.0619316506445
2007-07-01	59.4129342777286
2007-10-01	57.6735023739844
2008-01-01	58.3778440928591
2008-04-01	58.8490143971811
2008-07-01	58.7399207718085
2008-10-01	57.5015638952556
2009-01-01	56.8839712838107
2009-04-01	58.8978482055316
2009-07-01	58.8840966114572
2009-10-01	58.3282786821056
2010-01-01	58.1401959316591
2010-04-01	58.2079890526882
2010-07-01	59.2701599898474
2010-10-01	58.1652042484973
2011-01-01	58.9147905931855
2011-04-01	59.3633707015432
2011-07-01	59.7460204385878
2011-10-01	60.1649186819357
2012-01-01	60.5981665386023
2012-04-01	61.0973675153780
2012-07-01	60.3476029065410
2012-10-01	61.3335932808696
2013-01-01	60.7118515749577
2013-04-01	61.6334283205561
2013-07-01	62.2784996507393
2013-10-01	61.9921508743019
2014-01-01	61.7885614743743
2014-04-01	62.8388604475234
2014-07-01	63.7184534065562
2014-10-01	64.5773185769663
2015-01-01	64.8458718868865
2015-04-01	65.1522153576891
2015-07-01	63.9802051824057
2015-10-01	64.7316388950496
2016-01-01	66.0510893312700
2016-04-01	68.0900003179035
2016-07-01	68.5643169067115
2016-10-01	68.3654707811266
2017-01-01	67.3811062698226
2017-04-01	69.4613256087414
2017-07-01	69.7865610744001
2017-10-01	69.1585282460474
2018-01-01	69.1531629855604
2018-04-01	70.6178873768611