Quarter	Percent, Seasonally Adjusted
1999-01-01	68.6669865630609
1999-04-01	68.5807418394283
1999-07-01	68.5638785594259
1999-10-01	68.3560574614402
2000-01-01	68.4885129368232
2000-04-01	68.5174766180166
2000-07-01	68.4091972547588
2000-10-01	68.4854242146999
2001-01-01	68.3228981855636
2001-04-01	68.4474129472408
2001-07-01	68.3301134503952
2001-10-01	68.4580942232287
2002-01-01	68.7060112745045
2002-04-01	68.7245488963470
2002-07-01	68.6467824866079
2002-10-01	68.8641795560890
2003-01-01	69.0107519312730
2003-04-01	69.0465459250254
2003-07-01	68.8681589739628
2003-10-01	68.8125482431480
2004-01-01	66.3528854664110
2004-04-01	66.4018519683919
2004-07-01	66.5430148995384
2004-10-01	66.7102434437774
2005-01-01	67.0476911432618
2005-04-01	67.2135240807585
2005-07-01	67.6096703467130
2005-10-01	67.6905691868978
2006-01-01	67.9130476784557
2006-04-01	68.4291438985491
2006-07-01	68.8808717689194
2006-10-01	69.0042513022926
2007-01-01	69.5072465221920
2007-04-01	69.6548599041464
2007-07-01	70.1828622233969
2007-10-01	70.1689136336445
2008-01-01	70.7981640491840
2008-04-01	70.9787290360805
2008-07-01	70.6108235991846
2008-10-01	70.7962082285985
2009-01-01	70.4933962686532
2009-04-01	70.2576296503949
2009-07-01	70.1869771408958
2009-10-01	70.3861924730388
2010-01-01	70.5109344054756
2010-04-01	70.5383883112525
2010-07-01	70.8423880469670
2010-10-01	71.2218540932756
2011-01-01	70.9420277351708
2011-04-01	71.0998133689660
2011-07-01	71.3202835266843
2011-10-01	71.0383935792070
2012-01-01	71.3794783417228
2012-04-01	71.4409693812423
2012-07-01	71.3180388115780
2012-10-01	71.4685414156812
2013-01-01	71.3305765210654
2013-04-01	71.6297181750554
2013-07-01	71.4637194819032
2013-10-01	71.2302763729995
2014-01-01	71.1044800025532
2014-04-01	71.2470592705914
2014-07-01	70.9254483733949
2014-10-01	71.0376141468811
2015-01-01	71.1645525648708
2015-04-01	70.8734283126622
2015-07-01	71.1637248171250
2015-10-01	71.2213321833349
2016-01-01	71.4160063245616
2016-04-01	71.3697694203597
2016-07-01	71.6999083750398
2016-10-01	71.6937613470322
2017-01-01	71.8273937893548
2017-04-01	72.1615540762146
2017-07-01	72.0756387845580
2017-10-01	72.5911987528671
2018-01-01	72.8128332027877
2018-04-01	73.0182669357587