Quarter	Percent
1999-07-01	48.3635111530168
1999-10-01	48.0912481992272
2000-01-01	49.3614493113487
2000-04-01	47.5549038765494
2000-07-01	47.3718717529586
2000-10-01	47.4613044391158
2001-01-01	48.7549164765103
2001-04-01	46.4309256145739
2001-07-01	46.8322349714935
2001-10-01	46.5753733157729
2002-01-01	47.4482890088332
2002-04-01	45.6130395934697
2002-07-01	46.1843219736871
2002-10-01	46.5532491861446
2003-01-01	48.1630224299168
2003-04-01	46.5056827712110
2003-07-01	46.7292240056824
2003-10-01	46.6065221128607
2004-01-01	46.5742203207675
2004-04-01	45.1823461798024
2004-07-01	45.6027786697683
2004-10-01	45.5960998519160
2005-01-01	46.5408782970778
2005-04-01	45.0348736462559
2005-07-01	45.2422267940723
2005-10-01	45.0156542384699
2006-01-01	45.8623008466671
2006-04-01	44.5097586937626
2006-07-01	45.0475599951012
2006-10-01	44.8971671491844
2007-01-01	45.9246232720967
2007-04-01	44.5181804370592
2007-07-01	45.0477000898001
2007-10-01	44.8367249163722
2008-01-01	45.9358630896038
2008-04-01	44.3503458120997
2008-07-01	45.1483155033711
2008-10-01	45.2488096993697
2009-01-01	46.8432325301172
2009-04-01	45.4071373926717
2009-07-01	45.7492423190607
2009-10-01	45.9759829263137
2010-01-01	46.3891824616022
2010-04-01	44.8436871663707
2010-07-01	45.1060527598966
2010-10-01	45.4831183539011
2011-01-01	46.1453207125407
2011-04-01	44.2239445117388
2011-07-01	44.9823043962576
2011-10-01	45.0773252360852
2012-01-01	45.6805531864449
2012-04-01	43.8834730697299
2012-07-01	44.5456758474867
2012-10-01	44.9467138611262
2013-01-01	45.8210449067443
2013-04-01	43.8520437662780
2013-07-01	43.8795166942552
2013-10-01	43.9273283406270
2014-01-01	43.9654977994094
2014-04-01	42.4089550750020
2014-07-01	42.5665582337013
2014-10-01	42.7931170634276
2015-01-01	43.0527411205857
2015-04-01	41.8154426016243
2015-07-01	41.8309840157508
2015-10-01	41.8977048226930
2016-01-01	42.4098768317730
2016-04-01	41.4863603361932
2016-07-01	41.3864971700650
2016-10-01	41.5180895161706
2017-01-01	41.6507068109506
2017-04-01	40.6389307903105
2017-07-01	40.7692794586784
2017-10-01	40.9427045067034
2018-01-01	41.2407956166488
2018-04-01	40.1846752040288
2018-07-01	40.3113149555021