Year	Percent
1996-01-01	66.1431
1997-01-01	79.4826
1998-01-01	81.5398
1999-01-01	56.5218
2000-01-01	73.9259
2001-01-01	79.8217
2002-01-01	66.3898
2003-01-01	70.5277
2004-01-01	65.3809
2005-01-01	66.6915
2006-01-01	61.6079
2007-01-01	58.2150
2008-01-01	55.2570
2009-01-01	58.7137
2010-01-01	55.8899
2011-01-01	54.9197
2012-01-01	63.3909
2013-01-01	55.4305
2014-01-01	55.3273