Quarter	Percent
1999-07-01	60.4873519252474
1999-10-01	61.2928061582651
2000-01-01	59.7979058388236
2000-04-01	61.9004840450790
2000-07-01	62.2165163105046
2000-10-01	62.1361565209684
2001-01-01	60.0356823071632
2001-04-01	62.9124500708317
2001-07-01	62.8706838888004
2001-10-01	63.0019916660457
2002-01-01	62.0478760328286
2002-04-01	64.0282812316073
2002-07-01	63.8632650816314
2002-10-01	63.6827858655617
2003-01-01	62.0685506367536
2003-04-01	63.4436777418720
2003-07-01	63.2437935742155
2003-10-01	63.3823879477494
2004-01-01	62.9142123088040
2004-04-01	64.2216289636370
2004-07-01	63.8585164121957
2004-10-01	64.0738214859178
2005-01-01	62.7640007218529
2005-04-01	64.2730124549639
2005-07-01	63.9170326959998
2005-10-01	64.0369687429078
2006-01-01	63.0432157188792
2006-04-01	64.5430217531619
2006-07-01	64.1292645484562
2006-10-01	64.1773509586200
2007-01-01	63.1959564850724
2007-04-01	64.6679762864626
2007-07-01	64.3307208055462
2007-10-01	64.3861736630784
2008-01-01	63.1896267415809
2008-04-01	64.6642320852308
2008-07-01	64.1334195804322
2008-10-01	63.8355291590161
2009-01-01	62.1084344989368
2009-04-01	63.4996215824242
2009-07-01	63.2466026049729
2009-10-01	63.2137414883320
2010-01-01	62.1093838840027
2010-04-01	64.0304829983779
2010-07-01	63.7482784563856
2010-10-01	63.6633635823184
2011-01-01	62.6657739248974
2011-04-01	64.5378093127883
2011-07-01	64.1607356161024
2011-10-01	64.2950373405029
2012-01-01	63.3005322178263
2012-04-01	64.9584918739185
2012-07-01	64.7022771155940
2012-10-01	64.4134447180278
2013-01-01	63.1847199036838
2013-04-01	65.0090250906726
2013-07-01	65.0913696908991
2013-10-01	65.2239582633174
2014-01-01	64.6326778893463
2014-04-01	65.7986934831737
2014-07-01	66.0079276902109
2014-10-01	65.8255494610569
2015-01-01	65.0560472523980
2015-04-01	66.0831694584606
2015-07-01	66.2536066735903
2015-10-01	66.2463964828797
2016-01-01	65.1575495175164
2016-04-01	66.1845380437132
2016-07-01	66.4887144177108
2016-10-01	66.4718557885922
2017-01-01	65.7723069895952
2017-04-01	66.9020038774920
2017-07-01	66.9849804756909
2017-10-01	66.8577648612841
2018-01-01	66.0419127501316
2018-04-01	66.8773569506472
2018-07-01	66.7368289368022