Year	Percent
1995-01-01	54.0677760200000
1996-01-01	54.2659498750000
1997-01-01	54.0203657075000
1998-01-01	53.6013490275000
1999-01-01	52.5063688900000
2000-01-01	51.6416928725000
2001-01-01	51.7043845050000
2002-01-01	51.5667691450000
2003-01-01	50.6960913250000
2004-01-01	50.1768279025000
2005-01-01	49.6382556725000
2006-01-01	49.3509601950000
2007-01-01	48.6741339700000
2008-01-01	48.4495166350000
2009-01-01	47.7997899175000
2010-01-01	47.2512347150000
2011-01-01	47.2511700875000
2012-01-01	41.8916666666667
2013-01-01	41.7666666666667
2014-01-01	40.8000000000000
2015-01-01	40.8666666666667
2016-01-01	40.6083333333333
2017-01-01	40.7333333333333