Year	Percent
1996-01-01	98.117000000000000
1997-01-01	96.562700000000000
1998-01-01	97.215700000000000
1999-01-01	81.983900000000000
2000-01-01	75.474700000000000
2001-01-01	73.653300000000000
2002-01-01	74.005600000000000
2003-01-01	66.745000000000000
2004-01-01	67.080100000000000
2005-01-01	65.060500000000000
2006-01-01	63.014600000000000
2007-01-01	48.588600000000000
2008-01-01	49.722000000000000
2009-01-01	47.193000000000005
2010-01-01	48.333000000000000
2011-01-01	49.538300000000000
2012-01-01	26.986400000000000
2013-01-01	28.713400000000000
2014-01-01	30.108300000000000
2015-01-01	37.273700000000000
2016-01-01	34.192000000000000