Quarter	Percent
2005-01-01	70.4364793149880
2005-04-01	70.6969503226216
2005-07-01	71.0641777350828
2005-10-01	71.3692885578875
2006-01-01	71.3548112453329
2006-04-01	71.6261170770072
2006-07-01	72.0179256088446
2006-10-01	72.0852766723086
2007-01-01	71.6964658547634
2007-04-01	72.1147682549691
2007-07-01	71.8027960933606
2007-10-01	72.4847110073842
2008-01-01	72.0748777620019
2008-04-01	72.4894728384667
2008-07-01	71.9502472756852
2008-10-01	71.8370466943769
2009-01-01	72.0271430891928
2009-04-01	72.2235654225688
2009-07-01	73.2801028016126
2009-10-01	72.8763971297824
2010-01-01	72.0675643188911
2010-04-01	73.0480907347062
2010-07-01	72.4240496190002
2010-10-01	71.8237417978740
2011-01-01	72.0098986481346
2011-04-01	72.7691244364918
2011-07-01	72.8886153344068
2011-10-01	73.4637528625906
2012-01-01	72.9887291305040
2012-04-01	73.9929957527511
2012-07-01	73.9812142030180
2012-10-01	73.4915656907364
2013-01-01	73.0916112785065
2013-04-01	73.9407656099019
2013-07-01	73.7752643109224
2013-10-01	74.1096204204688
2014-01-01	73.1066407840044
2014-04-01	73.1963966689278
2014-07-01	73.0123998898118
2014-10-01	73.1069745864013
2015-01-01	72.9777457133824
2015-04-01	73.5177032402723
2015-07-01	73.4038078746957
2015-10-01	74.2377500267101
2016-01-01	73.6051753758698
2016-04-01	73.7213131919684
2016-07-01	73.7397581992370
2016-10-01	73.6619606362580
2017-01-01	73.4459703576659
2017-04-01	73.5373414966494
2017-07-01	73.3570631624539
2017-10-01	73.6661078249631
2018-01-01	73.4771800593618
2018-04-01	74.1106882494696