Quarter	Percent
1999-07-01	48.6343569921536
1999-10-01	48.7450785363164
2000-01-01	47.0352585339103
2000-04-01	49.3526525721819
2000-07-01	49.5721737412097
2000-10-01	49.1116992775206
2001-01-01	47.4023585903310
2001-04-01	50.2232112070576
2001-07-01	49.9075441186372
2001-10-01	49.8852772663304
2002-01-01	48.5861108654164
2002-04-01	50.8414649472346
2002-07-01	50.2960646804267
2002-10-01	49.7147766655529
2003-01-01	47.6783964913790
2003-04-01	49.6731324137436
2003-07-01	49.5142397903633
2003-10-01	49.3848740648641
2004-01-01	49.0428552118737
2004-04-01	50.8548373907215
2004-07-01	50.4200803562981
2004-10-01	50.2380070543678
2005-01-01	48.9044362393175
2005-04-01	50.9696410952550
2005-07-01	50.6279508647938
2005-10-01	50.5607703141081
2006-01-01	49.3127703284463
2006-04-01	51.2544004638705
2006-07-01	50.7501050742945
2006-10-01	50.6853743496309
2007-01-01	49.2261265035468
2007-04-01	51.2957555555177
2007-07-01	50.7113249636376
2007-10-01	50.5874211694555
2008-01-01	49.0724224313204
2008-04-01	51.1514758480095
2008-07-01	50.4521902435371
2008-10-01	50.1050720930625
2009-01-01	48.0448158317831
2009-04-01	50.0798683328549
2009-07-01	49.8702194735565
2009-10-01	49.2030593928245
2010-01-01	48.1640632404451
2010-04-01	50.5116269569438
2010-07-01	50.2383148049254
2010-10-01	49.3876522304990
2011-01-01	48.2611229673219
2011-04-01	50.9763887491105
2011-07-01	50.2539095466624
2011-10-01	49.7523677848109
2012-01-01	48.7177312916541
2012-04-01	51.2813443328413
2012-07-01	50.6553462253709
2012-10-01	49.8214886451830
2013-01-01	48.4656002169703
2013-04-01	51.1394103267371
2013-07-01	51.0952420531879
2013-10-01	50.6749700401678
2014-01-01	50.0662105899128
2014-04-01	52.2720132802327
2014-07-01	52.1187747305147
2014-10-01	51.5070019824666
2015-01-01	50.6253072461694
2015-04-01	52.4715469416612
2015-07-01	52.4641535759274
2015-10-01	52.0050090313957
2016-01-01	50.9920054831946
2016-04-01	52.6526926914739
2016-07-01	52.7308964618861
2016-10-01	52.2721075250647
2017-01-01	51.5583816152052
2017-04-01	53.2255400923006
2017-07-01	53.1625219433518
2017-10-01	52.6743562539849
2018-01-01	51.7580505868371
2018-04-01	53.5093317674931
2018-07-01	53.4312699235588