Year	Percent
1996-01-01	56.283700000000000
1997-01-01	51.165000000000000
1998-01-01	48.980600000000000
1999-01-01	47.832300000000000
2000-01-01	44.256800000000000
2001-01-01	44.322500000000000
2002-01-01	47.385600000000000
2003-01-01	48.569200000000000
2004-01-01	48.388999999999996
2005-01-01	45.359800000000000
2006-01-01	40.566300000000000
2007-01-01	44.680400000000000
2008-01-01	45.057200000000000
2009-01-01	45.615000000000000
2010-01-01	47.822400000000000
2011-01-01	47.531200000000000
2012-01-01	46.883400000000000
2013-01-01	47.133999999999990
2014-01-01	53.024600000000000