Year	Percent
1996-01-01	67.94580000000000
1997-01-01	76.58350000000000
1998-01-01	78.80260000000000
1999-01-01	81.25820000000000
2000-01-01	79.90410000000000
2001-01-01	69.07150000000000
2002-01-01	71.85990000000000
2003-01-01	83.06360000000000
2004-01-01	53.64120000000000
2005-01-01	77.64960000000000
2006-01-01	68.25630000000000
2007-01-01	64.11610000000000
2008-01-01	65.65730000000000
2009-01-01	64.37520000000000
2010-01-01	69.43260000000000
2011-01-01	69.50270000000000
2012-01-01	63.54210000000000
2013-01-01	63.06399999999999
2014-01-01	60.57490000000000