Quarter	Percent
2005-01-01	72.5588539946317
2005-04-01	72.6237655508529
2005-07-01	72.2761838174944
2005-10-01	72.5270807185284
2006-01-01	73.2982183370088
2006-04-01	73.3238244353898
2006-07-01	72.9351467677707
2006-10-01	73.5383038152127
2007-01-01	73.9763511236586
2007-04-01	73.5624998134958
2007-07-01	73.6077084690869
2007-10-01	74.5975700884497
2008-01-01	75.1199121693979
2008-04-01	75.2339135667640
2008-07-01	74.9067539646336
2008-10-01	75.8489161086972
2009-01-01	75.6089959154213
2009-04-01	75.5221433854427
2009-07-01	75.3884870667245
2009-10-01	75.9638848942195
2010-01-01	76.5521449566544
2010-04-01	77.3099799381943
2010-07-01	77.9981894291420
2010-10-01	78.4305397637197
2011-01-01	78.4921838208265
2011-04-01	79.1779296838001
2011-07-01	78.9972744621011
2011-10-01	79.2370890306011
2012-01-01	78.8682056188063
2012-04-01	78.6665696811576
2012-07-01	78.9554080299336
2012-10-01	78.9980240654209
2013-01-01	79.1454983495473
2013-04-01	79.2469579751144
2013-07-01	78.9684472854431
2013-10-01	79.3368537307048
2014-01-01	79.1177161470718
2014-04-01	79.3249617900359
2014-07-01	79.0664561567559
2014-10-01	79.5308085525146
2015-01-01	78.8855348134959
2015-04-01	79.3130589711668
2015-07-01	79.6282892236603
2015-10-01	79.8278369111272
2016-01-01	79.1510282365226
2016-04-01	79.7042005239239
2016-07-01	79.8502118423480
2016-10-01	79.8270032578410
2017-01-01	79.2139160866634
2017-04-01	80.0138612708957
2017-07-01	79.9039237582473
2017-10-01	80.4350082313951
2018-01-01	80.1939017078290
2018-04-01	80.6109741010080
2018-07-01	79.8861083366841