Quarter	Percent
2005-01-01	80.4466547295697
2005-04-01	80.2447089853551
2005-07-01	81.0125143439324
2005-10-01	81.2442870683357
2006-01-01	80.7943857582909
2006-04-01	81.6294301611937
2006-07-01	81.3442602574546
2006-10-01	81.2973241807240
2007-01-01	80.3505155733734
2007-04-01	80.9292168120819
2007-07-01	80.6527698742549
2007-10-01	81.3979310605110
2008-01-01	80.1861296774219
2008-04-01	80.7585539168468
2008-07-01	80.4705599216926
2008-10-01	79.2053729547910
2009-01-01	78.1066717568816
2009-04-01	77.7582120890982
2009-07-01	77.9555648196032
2009-10-01	78.4755344597812
2010-01-01	77.4916531105104
2010-04-01	78.4829753740920
2010-07-01	78.1352462767210
2010-10-01	77.2565809362987
2011-01-01	77.2101521055329
2011-04-01	77.7819181666280
2011-07-01	78.1389001372491
2011-10-01	78.5564484953368
2012-01-01	77.7431495914424
2012-04-01	78.8975330412234
2012-07-01	79.1550261995630
2012-10-01	78.2535232472153
2013-01-01	77.6101253234923
2013-04-01	78.2609650888639
2013-07-01	78.2556096653402
2013-10-01	78.8817106701014
2014-01-01	77.9862962880880
2014-04-01	77.8849080977788
2014-07-01	78.1649674873656
2014-10-01	78.3847585975537
2015-01-01	77.9672956595010
2015-04-01	78.2455733001822
2015-07-01	78.3100510705652
2015-10-01	78.8389631638849
2016-01-01	77.8776213840440
2016-04-01	78.3581202179273
2016-07-01	79.0084061588244
2016-10-01	79.0331563417653
2017-01-01	78.7397034069695
2017-04-01	78.9472369831246
2017-07-01	79.1113087620929
2017-10-01	79.0148887627386
2018-01-01	78.7867128146688
2018-04-01	78.8916851051532