Quarter	Percent
2005-01-01	57.3274942377122
2005-04-01	56.5639880684626
2005-07-01	56.2690588458294
2005-10-01	56.0862415543087
2006-01-01	56.2062091699528
2006-04-01	55.3803062859486
2006-07-01	55.0276997540680
2006-10-01	54.8450301470922
2007-01-01	55.1881071003145
2007-04-01	54.5218895887562
2007-07-01	54.5442379192969
2007-10-01	54.2051874140618
2008-01-01	54.5147946253472
2008-04-01	53.7593269780216
2008-07-01	53.9538270228656
2008-10-01	53.5677668788727
2009-01-01	53.5369126328647
2009-04-01	52.6381114037152
2009-07-01	52.8169949844475
2009-10-01	52.7331235199195
2010-01-01	52.6684010133255
2010-04-01	51.9777239255083
2010-07-01	51.8326513692600
2010-10-01	52.0561546718021
2011-01-01	51.9893851060731
2011-04-01	51.2260082730388
2011-07-01	51.1743431491105
2011-10-01	51.1053929040323
2012-01-01	50.9481924162204
2012-04-01	50.2128537813382
2012-07-01	50.3595659158830
2012-10-01	49.9834758875990
2013-01-01	49.8347610130608
2013-04-01	49.2805686113210
2013-07-01	49.2537014544735
2013-10-01	49.0146748720202
2014-01-01	49.0091368508697
2014-04-01	48.3899110259192
2014-07-01	48.4721091557616
2014-10-01	48.1349543232579
2015-01-01	48.2360323125473
2015-04-01	47.8070155617279
2015-07-01	47.5291932651914
2015-10-01	47.1468384934546
2016-01-01	47.0498825654806
2016-04-01	46.6490174377948
2016-07-01	46.6599935125994
2016-10-01	46.2832372060827
2017-01-01	46.0926763485833
2017-04-01	45.6412936748453
2017-07-01	45.4450278988503
2017-10-01	45.2429928616048
2018-01-01	45.1912201611990
2018-04-01	44.7840149489209