Quarter	Percent, Seasonally Adjusted
1998-01-01	62.8297226324042
1998-04-01	62.9939925464163
1998-07-01	63.3901227960438
1998-10-01	63.5046445666951
1999-01-01	63.9088050402256
1999-04-01	63.6778211892505
1999-07-01	63.5785371844382
1999-10-01	63.8590822541782
2000-01-01	63.6284015041924
2000-04-01	63.8470840932108
2000-07-01	63.9517179960770
2000-10-01	63.9224992634317
2001-01-01	63.3831439917215
2001-04-01	63.1735862585926
2001-07-01	63.3079430773450
2001-10-01	63.3334219438714
2002-01-01	63.5376442095800
2002-04-01	64.0536457146511
2002-07-01	64.3808244969749
2002-10-01	64.6124255730612
2003-01-01	64.7552205545610
2003-04-01	64.8092897412506
2003-07-01	65.0351019964299
2003-10-01	65.2233706774982
2004-01-01	66.0502693825865
2004-04-01	66.2022100848013
2004-07-01	66.1511113209652
2004-10-01	66.3175306170587
2005-01-01	66.1556471889670
2005-04-01	66.3451440592255
2005-07-01	66.3777706928739
2005-10-01	66.5669122226989
2006-01-01	66.6806857492289
2006-04-01	66.5875145996390
2006-07-01	66.7379641424724
2006-10-01	66.6632228185481
2007-01-01	66.5507049758354
2007-04-01	66.4506367020904
2007-07-01	66.5735468272534
2007-10-01	66.5781754632863
2008-01-01	66.5332818991463
2008-04-01	66.6698666954668
2008-07-01	66.5958760731280
2008-10-01	66.8393694962689
2009-01-01	67.1609493884649
2009-04-01	67.3048164083568
2009-07-01	67.6536151719740
2009-10-01	67.5900552875985
2010-01-01	67.8514523269280
2010-04-01	67.8845209927936
2010-07-01	67.7980105818958
2010-10-01	67.8129345291651
2011-01-01	67.4646642381369
2011-04-01	67.1940832542705
2011-07-01	67.0696634747670
2011-10-01	67.3024369866749
2012-01-01	67.3559700749503
2012-04-01	67.3781595309541
2012-07-01	67.4591000025186
2012-10-01	67.6892888332507
2013-01-01	67.3705915094594
2013-04-01	67.6673953196516
2013-07-01	67.5513565167649
2013-10-01	67.3011542675048
2014-01-01	67.5674277265511
2014-04-01	67.4455297200516
2014-07-01	67.3919494491778
2014-10-01	67.2994625657668
2015-01-01	67.4284721870217
2015-04-01	67.6570025188258
2015-07-01	67.9535055646468
2015-10-01	68.1992982802221
2016-01-01	68.1688888649767
2016-04-01	68.1630614575650
2016-07-01	68.3963710133612
2016-10-01	68.1385433267518
2017-01-01	68.2450290524124
2017-04-01	68.4225371320887
2017-07-01	68.2475854570286
2017-10-01	68.1480386829214
2018-01-01	68.0118245082115
2018-04-01	68.2581131237240