Year	Percent
1995-01-01	49.9453624550000
1996-01-01	50.7544451125000
1997-01-01	52.0299802725000
1998-01-01	51.6322939475000
1999-01-01	50.7491875175000
2000-01-01	49.9424522900000
2001-01-01	48.4556641025000
2002-01-01	47.4041776575000
2003-01-01	46.0035107850000
2004-01-01	44.2358607075000
2005-01-01	43.4717236975000
2006-01-01	41.3299431800000
2007-01-01	39.6292001300000
2008-01-01	38.8282667800000
2009-01-01	37.8877758950000
2010-01-01	37.1515517075000
2011-01-01	36.0541410350000
2012-01-01	33.7083333333333
2013-01-01	32.3750000000000
2014-01-01	32.1000000000000
2015-01-01	31.0500000000000
2016-01-01	30.8333333333333
2017-01-01	30.8666666666667