Quarter	Percent
1995-01-01	66.0898228300000
1995-04-01	67.3808023500000
1995-07-01	62.1553884700000
1995-10-01	65.8430232600000
1996-01-01	66.6118759000000
1996-04-01	67.0751634000000
1996-07-01	62.5941763400000
1996-10-01	66.3697104700000
1997-01-01	67.0294236200000
1997-04-01	65.8972300300000
1997-07-01	63.5129740500000
1997-10-01	67.4210839800000
1998-01-01	66.1988535300000
1998-04-01	68.3703558100000
1998-07-01	64.6840148700000
1998-10-01	66.1864901700000
1999-01-01	67.3892007000000
1999-04-01	66.4672969300000
1999-07-01	64.3733231100000
1999-10-01	64.9571020000000
2000-01-01	66.6477057300000
2000-04-01	64.4734354300000
2000-07-01	62.0637615500000
2000-10-01	64.6451370600000
2001-01-01	65.4940119800000
2001-04-01	66.0440791900000
2001-07-01	63.8702460900000
2001-10-01	65.5826054600000
2002-01-01	66.5182711900000
2002-04-01	68.9131642300000
2002-07-01	66.0753880300000
2002-10-01	67.5944700500000
2003-01-01	68.5093053300000
2003-04-01	67.7828886800000
2003-07-01	63.6797649700000
2003-10-01	65.4881846500000
2004-01-01	66.6605672500000
2004-04-01	67.7383997100000
2004-07-01	64.2544659100000
2004-10-01	65.3391525700000
2005-01-01	65.9836808700000
2005-04-01	66.2624434400000
2005-07-01	65.5409066300000
2005-10-01	64.6730318900000
2006-01-01	66.6546891800000
2006-04-01	64.4253182700000
2006-07-01	63.2802718700000
2006-10-01	66.8510258700000
2007-01-01	66.9572953700000
2007-04-01	65.5362215900000
2007-07-01	64.1516117600000
2007-10-01	66.8138467000000
2008-01-01	67.2951541900000
2008-04-01	67.1591908500000
2008-07-01	65.7478932600000
2008-10-01	66.7776414900000
2009-01-01	65.9741620100000
2009-04-01	66.0969654700000
2009-07-01	65.0235150700000
2009-10-01	68.1746998400000
2010-01-01	67.4200278200000
2010-04-01	67.4011103400000
2010-07-01	64.4960166300000
2010-10-01	65.9636992200000
2011-01-01	67.8053830200000
2011-04-01	66.9881177900000
2011-07-01	67.5773195900000
2011-10-01	69.0606787800000
2012-01-01	53.6666666666667
2012-04-01	53.1333333333333
2012-07-01	47.9333333333333
2012-10-01	50.9333333333333
2013-01-01	52.0000000000000
2013-04-01	52.3666666666667
2013-07-01	49.7000000000000
2013-10-01	53.2333333333333
2014-01-01	51.6333333333333
2014-04-01	52.0333333333333
2014-07-01	49.2000000000000
2014-10-01	52.9333333333333
2015-01-01	53.6000000000000
2015-04-01	53.2000000000000
2015-07-01	50.2666666666667
2015-10-01	51.0666666666667
2016-01-01	52.3000000000000
2016-04-01	52.4333333333333
2016-07-01	50.6666666666667
2016-10-01	52.8333333333333
2017-01-01	52.2333333333333
2017-04-01	52.1333333333333
2017-07-01	50.5333333333333
2017-10-01	53.0333333333333
2018-01-01	52.9333333333333
2018-04-01	54.0000000000000
2018-07-01	51.1333333333333