Quarter	Percent, Seasonally Adjusted
1999-01-01	69.7044879195477
1999-04-01	69.5429839920772
1999-07-01	69.3771542308717
1999-10-01	69.2753718552050
2000-01-01	69.2240232784357
2000-04-01	68.8992961450051
2000-07-01	68.7038450095165
2000-10-01	68.5827517480105
2001-01-01	68.2655532534632
2001-04-01	68.3791572087520
2001-07-01	68.4011215731418
2001-10-01	68.4506612310307
2002-01-01	68.2162848738766
2002-04-01	68.1563954171459
2002-07-01	68.2049177670427
2002-10-01	68.2827205997351
2003-01-01	68.7856829054328
2003-04-01	68.5480272798947
2003-07-01	68.3769233778876
2003-10-01	68.3771331426890
2004-01-01	66.2829214835596
2004-04-01	66.2923616790661
2004-07-01	66.0602119688722
2004-10-01	65.8149890288853
2005-01-01	66.0172547975349
2005-04-01	66.2982687445063
2005-07-01	66.5156563906066
2005-10-01	66.7654344901524
2006-01-01	66.6723490556881
2006-04-01	66.6676303449938
2006-07-01	66.7903362284107
2006-10-01	66.8309560262477
2007-01-01	67.2236322853900
2007-04-01	67.5292102836580
2007-07-01	67.8595895625898
2007-10-01	67.6584493142149
2008-01-01	67.7474670952785
2008-04-01	67.5698137951852
2008-07-01	67.2637440345322
2008-10-01	67.3050610353472
2009-01-01	67.1654725790344
2009-04-01	67.2836732997064
2009-07-01	67.3574286404658
2009-10-01	67.4784707163273
2010-01-01	67.1521027619940
2010-04-01	67.1496440612933
2010-07-01	67.1204060527160
2010-10-01	66.9703935120555
2011-01-01	67.0478677456317
2011-04-01	66.8969727800422
2011-07-01	66.7767532076428
2011-10-01	66.8924368197481
2012-01-01	66.6738303032452
2012-04-01	67.0500296481412
2012-07-01	66.9812261961277
2012-10-01	66.9955036031102
2013-01-01	67.1560402861548
2013-04-01	66.9498597200532
2013-07-01	66.8598640242142
2013-10-01	66.7433675736047
2014-01-01	66.4825791767688
2014-04-01	66.4238090492855
2014-07-01	66.4591134704821
2014-10-01	66.3477639030448
2015-01-01	66.4463683851543
2015-04-01	66.3157628894007
2015-07-01	66.3635256368807
2015-10-01	66.4899216154463
2016-01-01	66.6185033854295
2016-04-01	66.8351079335486
2016-07-01	66.9240560967426
2016-10-01	66.7366310734212
2017-01-01	66.6813728808116
2017-04-01	66.7418625309960
2017-07-01	66.7856143366652
2017-10-01	67.0244119058158
2018-01-01	67.0711253223217
2018-04-01	67.1292385884110