Year	Percent
1996-01-01	65.47800000000001
1997-01-01	64.54690000000000
1998-01-01	66.19340000000000
1999-01-01	60.60660000000000
2000-01-01	61.64390000000000
2001-01-01	63.74320000000000
2002-01-01	68.60120000000000
2003-01-01	69.09680000000000
2004-01-01	69.03830000000000
2005-01-01	65.40120000000000
2006-01-01	63.19480000000000
2007-01-01	56.73840000000000
2008-01-01	57.97160000000000
2009-01-01	54.79220000000000
2010-01-01	60.64500000000000
2011-01-01	59.55260000000000
2012-01-01	59.80580000000000
2013-01-01	61.09740000000000
2014-01-01	56.85120000000000
2015-01-01	55.81580000000000
2016-01-01	51.52470000000000