Year	Percent
1996-01-01	97.16330000000000
1997-01-01	96.89360000000000
1998-01-01	96.46590000000000
1999-01-01	96.14670000000000
2000-01-01	95.79260000000000
2001-01-01	95.12040000000000
2002-01-01	95.61840000000000
2003-01-01	96.13820000000000
2004-01-01	95.32680000000000
2005-01-01	93.62860000000000
2006-01-01	92.90220000000000
2007-01-01	93.05770000000000
2008-01-01	93.10799999999999
2009-01-01	89.05090000000000
2010-01-01	88.28910000000000
2011-01-01	87.79410000000000
2012-01-01	88.88560000000000
2013-01-01	87.31650000000000
2014-01-01	86.31020000000000
2015-01-01	76.22500000000000
2016-01-01	75.08900000000000