Quarter	Percent, Seasonally Adjusted
1999-01-01	71.4800451942883
1999-04-01	71.2367137234794
1999-07-01	71.1409455251776
1999-10-01	71.0129354925602
2000-01-01	71.3314191892667
2000-04-01	70.8921611041106
2000-07-01	70.8658978759648
2000-10-01	70.9308605712426
2001-01-01	70.7384160952000
2001-04-01	70.9864696008100
2001-07-01	70.9194645164794
2001-10-01	71.2029278969130
2002-01-01	71.7171432994510
2002-04-01	71.4301093929290
2002-07-01	71.4694982349577
2002-10-01	71.7316316800331
2003-01-01	72.0473243764570
2003-04-01	72.1650009997465
2003-07-01	71.9337407217871
2003-10-01	72.0174696805877
2004-01-01	70.0782529590329
2004-04-01	70.2968714386966
2004-07-01	70.5141276624790
2004-10-01	70.6632754452578
2005-01-01	70.7872340657459
2005-04-01	71.3371753082854
2005-07-01	71.7907882024363
2005-10-01	71.8481695286125
2006-01-01	71.9797594356108
2006-04-01	72.3269113386507
2006-07-01	72.5779367077774
2006-10-01	72.6752588074894
2007-01-01	73.1105194329002
2007-04-01	73.4623711231447
2007-07-01	73.8913677257938
2007-10-01	73.5240724778493
2008-01-01	73.9740767805751
2008-04-01	73.8277050525137
2008-07-01	73.6599644345026
2008-10-01	74.1060302973889
2009-01-01	74.0358979029198
2009-04-01	74.3030417223736
2009-07-01	74.5276046499699
2009-10-01	74.4794369639231
2010-01-01	74.2694305251870
2010-04-01	74.3137139665450
2010-07-01	74.5002664840391
2010-10-01	74.6180924206467
2011-01-01	74.5687253654610
2011-04-01	74.5154198623765
2011-07-01	74.4176310386011
2011-10-01	74.7121487884129
2012-01-01	74.7843345834814
2012-04-01	75.1654185541562
2012-07-01	75.2416810123210
2012-10-01	75.2595933786917
2013-01-01	75.4655573382627
2013-04-01	75.5467706173949
2013-07-01	75.6102708199207
2013-10-01	75.4103307475745
2014-01-01	75.4362239786831
2014-04-01	75.4809388128216
2014-07-01	75.2284854848250
2014-10-01	75.3807313764832
2015-01-01	75.4050079257088
2015-04-01	75.3918953387401
2015-07-01	75.4910899048161
2015-10-01	75.7184280560636
2016-01-01	76.0356253848451
2016-04-01	76.1683400572095
2016-07-01	76.4635558353182
2016-10-01	76.1413221284401
2017-01-01	76.2445555943080
2017-04-01	76.4304245605023
2017-07-01	76.2895681717148
2017-10-01	76.7457037565435
2018-01-01	76.7342053518823
2018-04-01	76.7027665017257