Year	Percent
1995-01-01	66.6371159825000
1996-01-01	67.2903418100000
1997-01-01	67.4625178075000
1998-01-01	66.0065515150000
1999-01-01	65.0318857400000
2000-01-01	62.2909788300000
2001-01-01	60.7316753400000
2002-01-01	59.3278379300000
2003-01-01	56.7380447950000
2004-01-01	55.7114891025000
2005-01-01	54.3391172075000
2006-01-01	51.7532245700000
2007-01-01	49.7244990200000
2008-01-01	48.4631489650000
2009-01-01	47.0242801225000
2010-01-01	46.0239510150000
2011-01-01	45.3745314000000
2012-01-01	42.4083333333333
2013-01-01	40.8333333333333
2014-01-01	39.7333333333333
2015-01-01	38.2166666666667
2016-01-01	38.2083333333333
2017-01-01	38.6416666666667