Year	Percent
1996-01-01	47.984600000000000
1997-01-01	39.354800000000000
1998-01-01	55.193700000000000
1999-01-01	60.094300000000000
2000-01-01	48.544200000000000
2001-01-01	42.861000000000004
2002-01-01	50.430700000000000
2003-01-01	43.557900000000000
2004-01-01	73.136000000000010
2005-01-01	69.917600000000000
2006-01-01	67.814500000000000
2007-01-01	66.102500000000000
2008-01-01	60.776200000000000
2009-01-01	63.476800000000000
2010-01-01	69.200400000000000
2011-01-01	67.705300000000000
2012-01-01	66.051400000000000
2013-01-01	66.837400000000000
2014-01-01	66.040800000000000