Quarter	Percent
1999-07-01	46.2260582664678
1999-10-01	46.7700699864956
2000-01-01	44.8071802340675
2000-04-01	47.6846132095044
2000-07-01	47.9327448642068
2000-10-01	47.5314502710461
2001-01-01	45.3896581406612
2001-04-01	48.6278755984283
2001-07-01	48.4296683985220
2001-10-01	48.4205502189649
2002-01-01	46.8520550833361
2002-04-01	49.4955159036896
2002-07-01	49.0587779272576
2002-10-01	48.5531957803284
2003-01-01	45.9743167437270
2003-04-01	48.1031781938582
2003-07-01	47.9523034394294
2003-10-01	47.7624980253340
2004-01-01	47.0940486927091
2004-04-01	49.1589699008027
2004-07-01	48.8470138892821
2004-10-01	48.7284845978575
2005-01-01	46.9976513402681
2005-04-01	49.2210163368083
2005-07-01	49.0249133785323
2005-10-01	48.9905876664024
2006-01-01	47.6231025575026
2006-04-01	49.8196522739792
2006-07-01	49.2818307570118
2006-10-01	49.3127235378954
2007-01-01	47.7864218400592
2007-04-01	49.9709612677626
2007-07-01	49.4104613608572
2007-10-01	49.3000970359913
2008-01-01	47.6857574873432
2008-04-01	49.8056033781602
2008-07-01	49.1989814204538
2008-10-01	48.8504806224953
2009-01-01	46.5590324822720
2009-04-01	48.4640128397298
2009-07-01	48.4484490224950
2009-10-01	47.7965990388922
2010-01-01	46.0383222094889
2010-04-01	49.0537161383075
2010-07-01	48.6598833279778
2010-10-01	47.9603025227056
2011-01-01	46.3036084274782
2011-04-01	49.3995753969136
2011-07-01	48.8783963249000
2011-10-01	48.4740432083228
2012-01-01	46.9099999561653
2012-04-01	49.7375708967070
2012-07-01	49.2975363362598
2012-10-01	48.5880427543562
2013-01-01	46.8425531208247
2013-04-01	49.6647227055282
2013-07-01	49.7826941271606
2013-10-01	49.3731833202299
2014-01-01	48.0743024342770
2014-04-01	50.3340974510354
2014-07-01	50.4962998026876
2014-10-01	49.9294873295332
2015-01-01	48.5083363726861
2015-04-01	50.4589683560592
2015-07-01	50.7945396517985
2015-10-01	50.4647898862309
2016-01-01	48.8371318992229
2016-04-01	50.7633175377884
2016-07-01	50.9881510812551
2016-10-01	50.5844932170507
2017-01-01	49.2922414574879
2017-04-01	51.2728807744731
2017-07-01	51.4864610565438
2017-10-01	51.1240875280108
2018-01-01	49.4788557964954
2018-04-01	51.4933770962777
2018-07-01	51.4961347591070