Quarter	Percent, Seasonally Adjusted
1999-01-01	61.2634043835356
1999-04-01	63.1033843096572
1999-07-01	59.8784247798933
1999-10-01	62.1789598492947
2000-01-01	61.8329918259737
2000-04-01	59.9054091665321
2000-07-01	60.9360770867950
2000-10-01	62.6727055003066
2001-01-01	61.0449746068679
2001-04-01	61.4829545932898
2001-07-01	56.5199440291964
2001-10-01	62.4584541401855
2002-01-01	63.0508284243413
2002-04-01	61.3222222373407
2002-07-01	59.9007301864944
2002-10-01	60.2334845918610
2003-01-01	62.4885541847649
2003-04-01	60.6148896010662
2003-07-01	62.4074643147925
2003-10-01	60.7311514151645
2004-01-01	62.0404403775954
2004-04-01	62.8150459298684
2004-07-01	61.6220570926012
2004-10-01	62.9026639192849
2005-01-01	61.1627417686532
2005-04-01	63.9100803150026
2005-07-01	62.3495942918264
2005-10-01	62.0409565248194
2006-01-01	60.0620333456089
2006-04-01	62.8223152444589
2006-07-01	65.5375731759911
2006-10-01	62.0636524369386
2007-01-01	63.2952700977295
2007-04-01	63.4873508184150
2007-07-01	64.5029938295239
2007-10-01	64.2532484148911
2008-01-01	63.3223497438455
2008-04-01	64.3958039617718
2008-07-01	63.8742721806850
2008-10-01	64.5306583205646
2009-01-01	64.9800679261158
2009-04-01	64.3933649014941
2009-07-01	66.4358461223044
2009-10-01	64.5974152000533
2010-01-01	66.1480316412934
2010-04-01	64.3335971002286
2010-07-01	63.5840239253082
2010-10-01	65.1984370769032
2011-01-01	65.1015558788460
2011-04-01	66.9244028519340
2011-07-01	66.6508871247619
2011-10-01	64.8222041482375
2012-01-01	64.4997794898834
2012-04-01	64.0894958714721
2012-07-01	67.1156976233218
2012-10-01	64.4622741740089
2013-01-01	66.6406093539886
2013-04-01	64.6841377594974
2013-07-01	66.5175984324881
2013-10-01	67.5122227573496
2014-01-01	67.4597636278433
2014-04-01	68.3430263000420
2014-07-01	67.7637470935806
2014-10-01	67.4000550125056
2015-01-01	65.5879680887367
2015-04-01	67.5773592155930
2015-07-01	67.8964702418187
2015-10-01	67.7309289704775
2016-01-01	68.5728190221036
2016-04-01	68.4241327029377
2016-07-01	70.8622689903034
2016-10-01	69.3777318909574
2017-01-01	69.6890584976177
2017-04-01	69.9858656608922
2017-07-01	67.0938183564872
2017-10-01	70.7066108263762
2018-01-01	70.7790235318434
2018-04-01	68.4443202924111