Quarter	Percent
2005-01-01	68.2621913099955
2005-04-01	68.7326358257282
2005-07-01	69.0156873790435
2005-10-01	69.5812674599138
2006-01-01	69.3677645721858
2006-04-01	69.8178872483544
2006-07-01	69.7390776816827
2006-10-01	70.0565570390504
2007-01-01	69.4712754199461
2007-04-01	70.1701799036609
2007-07-01	69.6553835465394
2007-10-01	70.4988693824188
2008-01-01	69.8578976273665
2008-04-01	70.5123704132492
2008-07-01	69.6110098789492
2008-10-01	69.4068206565834
2009-01-01	68.9947628566026
2009-04-01	69.1977662536297
2009-07-01	69.5233953894159
2009-10-01	69.6283644005064
2010-01-01	68.7644399992743
2010-04-01	69.8298860110384
2010-07-01	69.1822822454344
2010-10-01	68.5885635453201
2011-01-01	68.8700487627872
2011-04-01	69.5537534705534
2011-07-01	69.5885807916711
2011-10-01	70.4922231665580
2012-01-01	70.0416488144516
2012-04-01	71.0688359605854
2012-07-01	70.8529068539632
2012-10-01	70.4287955152060
2013-01-01	70.0633215656367
2013-04-01	70.7449259650468
2013-07-01	70.5412721121701
2013-10-01	71.2205272388666
2014-01-01	70.1525092126750
2014-04-01	70.1615567350269
2014-07-01	69.7324159024632
2014-10-01	70.3935928053548
2015-01-01	70.3373098659709
2015-04-01	70.8509134089533
2015-07-01	70.4781121024582
2015-10-01	71.5918956795860
2016-01-01	71.0763030319048
2016-04-01	71.2271320318042
2016-07-01	71.1431854556169
2016-10-01	71.3653236284249
2017-01-01	71.2753500320169
2017-04-01	71.3067349185630
2017-07-01	71.1818020569609
2017-10-01	71.5385734779047
2018-01-01	71.5173933235797
2018-04-01	71.9976348497724