Quarter	Percent, Seasonally Adjusted
1999-01-01	73.7290762531486
1999-04-01	73.2379248307837
1999-07-01	73.0190967292208
1999-10-01	72.8924011851853
2000-01-01	72.3826968700134
2000-04-01	73.1284099928120
2000-07-01	73.2387946529334
2000-10-01	73.4881100733248
2001-01-01	73.2320791125614
2001-04-01	73.0458942879664
2001-07-01	73.5167824972298
2001-10-01	73.7343052192651
2002-01-01	73.0013693505652
2002-04-01	73.1343680347131
2002-07-01	73.4391475181715
2002-10-01	72.7638835048631
2003-01-01	73.7026286930579
2003-04-01	72.8935976318557
2003-07-01	72.9936335467894
2003-10-01	72.4875943344313
2004-01-01	73.0033186364284
2004-04-01	73.0957673916790
2004-07-01	73.2872848968699
2004-10-01	72.8592759596431
2005-01-01	72.9188371230720
2005-04-01	73.2545167575958
2005-07-01	72.8052275240776
2005-10-01	73.0875367649076
2006-01-01	73.3665364866137
2006-04-01	73.5637381410266
2006-07-01	74.2738273343181
2006-10-01	74.4384824685989
2007-01-01	74.2320091111932
2007-04-01	73.7581051652172
2007-07-01	72.9481815163756
2007-10-01	73.0741137837459
2008-01-01	73.4334029728070
2008-04-01	74.4384267618243
2008-07-01	74.4525761706909
2008-10-01	73.5848865024421
2009-01-01	71.9595679654488
2009-04-01	70.5568417619419
2009-07-01	70.2456791971777
2009-10-01	68.6266988710873
2010-01-01	68.3954893432269
2010-04-01	67.6780745214667
2010-07-01	67.7582398395561
2010-10-01	68.1867329002659
2011-01-01	68.2104359054148
2011-04-01	67.8837710378262
2011-07-01	68.0232226533022
2011-10-01	67.6431367113010
2012-01-01	67.6145901633300
2012-04-01	67.1008008877704
2012-07-01	66.6138282163190
2012-10-01	67.3064436852449
2013-01-01	67.2021929917732
2013-04-01	66.7211454983815
2013-07-01	66.0902659220666
2013-10-01	66.4509432085612
2014-01-01	66.6754098889012
2014-04-01	67.0181193435089
2014-07-01	67.4770708429514
2014-10-01	67.6341785729418
2015-01-01	67.9057396698734
2015-04-01	67.8489808024149
2015-07-01	67.6833770756929
2015-10-01	68.4892512644004
2016-01-01	69.2152085920211
2016-04-01	69.4234005612072
2016-07-01	69.3544607815364
2016-10-01	69.1617143585278
2017-01-01	67.8335114624404
2017-04-01	68.2495870197535
2017-07-01	68.1002334091002
2017-10-01	68.6653819448796
2018-01-01	68.9148242340452
2018-04-01	69.4357662471210