Quarter	Percent
2005-01-01	51.8714692599412
2005-04-01	52.1410682501930
2005-07-01	51.5838069072799
2005-10-01	52.1388140541251
2006-01-01	52.9958816175485
2006-04-01	53.3711562602835
2006-07-01	52.3804486444872
2006-10-01	53.9220591178236
2007-01-01	54.1922145221257
2007-04-01	53.8204928268657
2007-07-01	54.1937605133911
2007-10-01	56.0541200085440
2008-01-01	56.7762184485868
2008-04-01	57.2420014258486
2008-07-01	56.6587021211100
2008-10-01	58.7187525684831
2009-01-01	58.1101635783456
2009-04-01	58.1845112760118
2009-07-01	57.8289540723488
2009-10-01	59.3180732311167
2010-01-01	61.7034812629318
2010-04-01	62.4554541503694
2010-07-01	63.7753525458678
2010-10-01	64.7249622838575
2011-01-01	64.6566625675770
2011-04-01	65.7537114797733
2011-07-01	65.3807794197075
2011-10-01	66.1548768110316
2012-01-01	65.7735978896662
2012-04-01	65.6963417436817
2012-07-01	65.8646132694807
2012-10-01	65.7863876553855
2013-01-01	66.2795476023036
2013-04-01	66.5754072354713
2013-07-01	66.1468108444051
2013-10-01	66.8328806350435
2014-01-01	66.6897771057716
2014-04-01	67.3146640804845
2014-07-01	67.4437338167553
2014-10-01	67.7100943223168
2015-01-01	66.6852559382738
2015-04-01	67.4341745877997
2015-07-01	67.8941392306907
2015-10-01	68.1718394557765
2016-01-01	67.0986504007191
2016-04-01	68.3405281389921
2016-07-01	68.5033307819573
2016-10-01	68.6719613525707
2017-01-01	67.7348183962343
2017-04-01	68.8021265300754
2017-07-01	68.6791258007826
2017-10-01	69.7723425168580
2018-01-01	69.6003186725013
2018-04-01	70.1930980323139
2018-07-01	69.1140450573356