Quarter	Percent, Seasonally Adjusted
1999-04-01	66.8594040889772
1999-07-01	67.4296641063776
1999-10-01	67.8687662215203
2000-01-01	68.2160823612071
2000-04-01	68.5231419008372
2000-07-01	68.6336269115638
2000-10-01	68.6916099550686
2001-01-01	68.8651380624605
2001-04-01	68.9432274431150
2001-07-01	69.0264395214757
2001-10-01	68.6169320565587
2002-01-01	68.2390568812314
2002-04-01	67.9790300041115
2002-07-01	67.6711212015403
2002-10-01	67.6641308020695
2003-01-01	67.5182073508567
2003-04-01	67.5639869416453
2003-07-01	67.4535450746728
2003-10-01	67.7891888476023
2004-01-01	68.1156476462199
2004-04-01	67.9468028680087
2004-07-01	68.2406789968424
2004-10-01	68.3670095581939
2005-01-01	68.4821619966387
2005-04-01	68.8700857846597
2005-07-01	69.2750986693692
2005-10-01	69.4102657683438
2006-01-01	69.8660997132028
2006-04-01	70.0090154244849
2006-07-01	70.2001815281324
2006-10-01	70.2655893930842
2007-01-01	73.0748271996252
2007-04-01	72.7576686982777
2007-07-01	72.4032132427164
2007-10-01	72.0196525463063
2008-01-01	71.3740528095960
2008-04-01	70.3548601054324
2008-07-01	69.0861712834506
2008-10-01	67.2212157738563
2009-01-01	63.4506413761914
2009-04-01	61.9565575598507
2009-07-01	60.3994743970390
2009-10-01	59.6592769138183
2010-01-01	58.9388362719790
2010-04-01	58.4447561918217
2010-07-01	58.0540137143837
2010-10-01	57.3804588389985
2011-01-01	57.2290869286053
2011-04-01	57.0672801692708
2011-07-01	56.6404451658697
2011-10-01	56.8882419322622
2012-01-01	56.5013302032575
2012-04-01	56.3746886577743
2012-07-01	56.6622473316513
2012-10-01	56.8577767704341
2013-01-01	57.6691923975156
2013-04-01	58.4459160595602
2013-07-01	59.0270590721667
2013-10-01	59.5404481076526
2014-01-01	59.6844919477246
2014-04-01	59.7739149021028
2014-07-01	60.1945910576236
2014-10-01	60.7948849818890
2015-01-01	61.3111838315034
2015-04-01	61.6667847786676
2015-07-01	61.8408566082973
2015-10-01	61.8672837745098
2016-01-01	62.1567789769080
2016-04-01	62.7624738593838
2016-07-01	63.1199672150737
2016-10-01	63.2577177920356
2017-01-01	63.3674406286802
2017-04-01	63.5153258023810
2017-07-01	63.7786397532519
2017-10-01	64.2024709719267
2018-01-01	64.4949882985123
2018-04-01	64.5143196959251