Year	Percent
1996-01-01	19.988100000000000
1997-01-01	19.988100000000000
1998-01-01	20.910400000000000
1999-01-01	20.516600000000000
2000-01-01	47.567500000000000
2001-01-01	57.747600000000000
2002-01-01	60.761600000000000
2003-01-01	67.439500000000000
2004-01-01	22.605999999999998
2005-01-01	22.332500000000000
2006-01-01	26.016900000000000
2007-01-01	23.594200000000000
2008-01-01	20.840300000000000
2009-01-01	20.682700000000000
2010-01-01	19.988100000000000
2011-01-01	19.988100000000000
2012-01-01	19.988100000000000
2013-01-01	24.074300000000000
2014-01-01	25.359700000000000