Quarter	Percent, Seasonally Adjusted
1999-01-01	46.3329717937372
1999-04-01	50.7937465180394
1999-07-01	50.5610239036974
1999-10-01	47.6913965468322
2000-01-01	48.5011382272638
2000-04-01	48.4743265763292
2000-07-01	49.8581179847266
2000-10-01	49.2869901890386
2001-01-01	49.2993587553502
2001-04-01	51.9347666430219
2001-07-01	51.8922010629325
2001-10-01	54.8851284959295
2002-01-01	52.0664279248930
2002-04-01	52.1919607891842
2002-07-01	54.0741676000784
2002-10-01	53.4652107959296
2003-01-01	55.0033009634645
2003-04-01	55.3952080904723
2003-07-01	56.9974845087845
2003-10-01	56.3242990131989
2004-01-01	56.5616884984432
2004-04-01	57.5650835417987
2004-07-01	56.6890745247349
2004-10-01	55.0320839321416
2005-01-01	57.3200889344679
2005-04-01	55.7641503715336
2005-07-01	56.3424531765405
2005-10-01	57.8486898011408
2006-01-01	57.6354931316771
2006-04-01	55.7691185098777
2006-07-01	56.9091538632744
2006-10-01	56.5730826060328
2007-01-01	55.0382320389591
2007-04-01	56.1197059092844
2007-07-01	56.0752866421705
2007-10-01	53.2033395061545
2008-01-01	53.8002348458029
2008-04-01	54.2759644635590
2008-07-01	53.4642606047165
2008-10-01	50.4916773972708
2009-01-01	51.5456431104274
2009-04-01	54.3767961186951
2009-07-01	53.8351737083637
2009-10-01	54.1821725270304
2010-01-01	54.6593991088258
2010-04-01	56.3113269030521
2010-07-01	57.0573140299083
2010-10-01	55.3821973754912
2011-01-01	57.6500989983336
2011-04-01	57.6271856818461
2011-07-01	58.4262355924863
2011-10-01	58.4928242398597
2012-01-01	59.3044064298142
2012-04-01	59.4637007290843
2012-07-01	58.8557984555701
2012-10-01	58.0536885566442
2013-01-01	58.6109215833190
2013-04-01	60.3020341633004
2013-07-01	61.0884621609458
2013-10-01	59.5021088511134
2014-01-01	59.0961862620125
2014-04-01	59.9629164268966
2014-07-01	60.4024812426657
2014-10-01	61.8180834374207
2015-01-01	62.7386646367840
2015-04-01	63.0968973249402
2015-07-01	61.9475182034190
2015-10-01	62.5438021729770
2016-01-01	64.9485641651520
2016-04-01	67.3145531421430
2016-07-01	66.5541828366854
2016-10-01	66.5778362662408
2017-01-01	66.5134501466273
2017-04-01	67.8553737122902
2017-07-01	68.1080103376785
2017-10-01	67.9483340758253
2018-01-01	67.2074638360145
2018-04-01	68.3726182272964