Quarter	Percent, Seasonally Adjusted
1999-01-01	54.1945877202378
1999-04-01	54.8928556462785
1999-07-01	55.2967036200205
1999-10-01	55.6971737970351
2000-01-01	56.5266373720923
2000-04-01	56.6503266481202
2000-07-01	56.9780425482122
2000-10-01	57.1306342255384
2001-01-01	58.4687923122799
2001-04-01	60.6084324638647
2001-07-01	61.6868484679054
2001-10-01	62.3524981590264
2002-01-01	63.2356819173216
2002-04-01	63.3980589292969
2002-07-01	64.2130694144654
2002-10-01	65.3135710434402
2003-01-01	64.3281882579553
2003-04-01	64.9890827317371
2003-07-01	65.5545680733704
2003-10-01	66.9530552092426
2004-01-01	67.4137760023302
2004-04-01	68.6733966182806
2004-07-01	69.1975775764640
2004-10-01	69.0174060629606
2005-01-01	68.8967826561846
2005-04-01	69.5531493962051
2005-07-01	70.2732390839727
2005-10-01	69.9792098202696
2006-01-01	70.5258525934331
2006-04-01	70.2065306184206
2006-07-01	69.5372289481746
2006-10-01	68.8901111214582
2007-01-01	69.5519394116721
2007-04-01	70.2013082852539
2007-07-01	70.9529154721764
2007-10-01	71.1225401153484
2008-01-01	71.0509050773073
2008-04-01	71.2379739524679
2008-07-01	70.6077277932016
2008-10-01	72.2660904842990
2009-01-01	72.6381055392206
2009-04-01	71.9320116175287
2009-07-01	72.2627570781803
2009-10-01	72.1782514404596
2010-01-01	72.2312014825136
2010-04-01	72.2852637854161
2010-07-01	72.9207737966702
2010-10-01	72.4402753575832
2011-01-01	72.3910453834979
2011-04-01	72.9168681495077
2011-07-01	72.8371487004924
2011-10-01	73.8777271011532
2012-01-01	73.8665388742621
2012-04-01	72.8948710949098
2012-07-01	71.6786040969045
2012-10-01	69.9455211971944
2013-01-01	70.3755998736066
2013-04-01	69.9961595792586
2013-07-01	67.9828068107528
2013-10-01	67.7342362777876
2014-01-01	66.6838299350845
2014-04-01	67.1014874532606
2014-07-01	67.1183635252734
2014-10-01	67.0666459926558
2015-01-01	66.4778417039477
2015-04-01	65.4567761928933
2015-07-01	65.2733755694489
2015-10-01	65.2153730188684
2016-01-01	64.2562234593995
2016-04-01	63.5181667482729
2016-07-01	63.8484963085324
2016-10-01	63.8307815946214
2017-01-01	64.1706549592098
2017-04-01	63.1114988473620
2017-07-01	63.4219471190695
2017-10-01	63.3732075931845
2018-01-01	63.3730393626762
2018-04-01	63.0553053932168