Quarter	Percent, Seasonally Adjusted
1998-01-01	64.1487491579101
1998-04-01	63.8449516447586
1998-07-01	63.7950361963690
1998-10-01	64.1505862562515
1999-01-01	64.1439803666148
1999-04-01	64.0478494633865
1999-07-01	64.0563466044902
1999-10-01	64.1737678079434
2000-01-01	64.0294539165561
2000-04-01	63.7019287565731
2000-07-01	63.4392777813354
2000-10-01	63.3565664924298
2001-01-01	63.8108880879962
2001-04-01	63.1464324154772
2001-07-01	63.0392141854355
2001-10-01	62.6914588049488
2002-01-01	62.5232298335757
2002-04-01	62.6569340460528
2002-07-01	62.7879643789988
2002-10-01	62.8961783474498
2003-01-01	62.8114211543355
2003-04-01	62.7850294381533
2003-07-01	62.3753589074032
2003-10-01	62.1718244811671
2004-01-01	62.3377172028504
2004-04-01	62.2835529813120
2004-07-01	62.0601775864654
2004-10-01	62.0838262839842
2005-01-01	61.9188788141130
2005-04-01	62.3037658421590
2005-07-01	62.6070351736095
2005-10-01	62.8213260481486
2006-01-01	62.7558951257052
2006-04-01	62.5231987310439
2006-07-01	62.2386306605499
2006-10-01	61.8468421474082
2007-01-01	61.8033268875072
2007-04-01	61.6601236373728
2007-07-01	61.2642353998555
2007-10-01	61.1571993770619
2008-01-01	60.9995703481806
2008-04-01	61.1775524096262
2008-07-01	60.9583179012897
2008-10-01	61.0101572838076
2009-01-01	61.1190394128676
2009-04-01	61.4696192729829
2009-07-01	61.7243248491403
2009-10-01	61.6436481447110
2010-01-01	61.3580627854134
2010-04-01	61.4135698615951
2010-07-01	61.5702091886557
2010-10-01	61.7451905286746
2011-01-01	61.9616310145428
2011-04-01	62.2100633058188
2011-07-01	62.3415000091591
2011-10-01	62.3240455590749
2012-01-01	62.6124392586713
2012-04-01	63.2568955114698
2012-07-01	63.8727691019451
2012-10-01	64.2443681501067
2013-01-01	64.4967252668451
2013-04-01	65.1483623867996
2013-07-01	65.2087942176498
2013-10-01	65.3863700124082
2014-01-01	65.3559737530875
2014-04-01	65.2055098260789
2014-07-01	65.5862718527586
2014-10-01	66.2597841557780
2015-01-01	66.4434724060428
2015-04-01	66.4462732966738
2015-07-01	66.5508729865972
2015-10-01	66.4154750738840
2016-01-01	66.9214706195594
2016-04-01	67.4491304367688
2016-07-01	67.7455009327836
2016-10-01	68.3952972293130
2017-01-01	68.4709540103844
2017-04-01	68.3835860415150
2017-07-01	68.9916621199661
2017-10-01	68.7968483495033
2018-01-01	69.1211786966315
2018-04-01	69.4870486839818