Quarter	Percent
2005-01-01	80.1816527687955
2005-04-01	80.6095428404692
2005-07-01	80.5732159861201
2005-10-01	80.7066189459469
2006-01-01	80.5095749316445
2006-04-01	80.9214273839307
2006-07-01	80.8881202510160
2006-10-01	81.0180193779576
2007-01-01	80.6992859955372
2007-04-01	81.0787496613226
2007-07-01	80.9841760426022
2007-10-01	81.1839033409601
2008-01-01	80.9228915671699
2008-04-01	81.3526684465817
2008-07-01	81.2390409315005
2008-10-01	81.3495544207980
2009-01-01	81.0348953679520
2009-04-01	81.2769824096690
2009-07-01	81.2609045346370
2009-10-01	81.2948386606351
2010-01-01	81.1039211035451
2010-04-01	81.4705287029186
2010-07-01	81.2231142071845
2010-10-01	81.2409862077900
2011-01-01	81.0513537358048
2011-04-01	81.4434506265762
2011-07-01	81.2458777730304
2011-10-01	81.3909688283064
2012-01-01	81.1629920124586
2012-04-01	81.6060598869758
2012-07-01	81.4858884651812
2012-10-01	81.5801824753460
2013-01-01	81.2587517396741
2013-04-01	81.6871885127253
2013-07-01	81.4498149532384
2013-10-01	81.5659992437869
2014-01-01	81.4031421271947
2014-04-01	81.5819111921367
2014-07-01	81.4624937352271
2014-10-01	81.6427446677107
2015-01-01	81.4485098543271
2015-04-01	81.7179279331934
2015-07-01	81.5115250514202
2015-10-01	81.8144959564662
2016-01-01	81.7117999675782
2016-04-01	81.9385183135266
2016-07-01	81.9391956229648
2016-10-01	82.0559588654738
2017-01-01	81.9435223558921
2017-04-01	82.1918836148637
2017-07-01	82.1443516919265
2017-10-01	82.3030087526103
2018-01-01	82.2348228739720
2018-04-01	82.5188487236553