Year	Percent
1995-01-01	45.6432449850000
1996-01-01	45.5854114150000
1997-01-01	45.8410336275000
1998-01-01	46.2757354675000
1999-01-01	47.2776242625000
2000-01-01	48.1567851775000
2001-01-01	48.2085132050000
2002-01-01	48.3614442875000
2003-01-01	49.1086808350000
2004-01-01	49.5653597950000
2005-01-01	50.0326228275000
2006-01-01	50.4133606825000
2007-01-01	51.0619558725000
2008-01-01	51.3199484900000
2009-01-01	52.3293587525000
2010-01-01	52.7420624475000
2011-01-01	52.6463571025000
2012-01-01	58.1083333333333
2013-01-01	58.2333333333333
2014-01-01	59.2000000000000
2015-01-01	59.1333333333333
2016-01-01	59.3916666666667
2017-01-01	59.2666666666667